diff --git a/SabreTools.Library/DatFiles/Listxml.cs b/SabreTools.Library/DatFiles/Listxml.cs
index 4bf23797..40bdddc3 100644
--- a/SabreTools.Library/DatFiles/Listxml.cs
+++ b/SabreTools.Library/DatFiles/Listxml.cs
@@ -362,7 +362,6 @@ namespace SabreTools.Library.DatFiles
                             Tag = reader.GetAttribute("tag"),
                             DisplayType = reader.GetAttribute("type").AsDisplayType(),
                             FlipX = reader.GetAttribute("flipx").AsYesNo(),
-                            Refresh = reader.GetAttribute("refresh"),
 
                             Source = new Source
                             {
@@ -392,6 +391,13 @@ namespace SabreTools.Library.DatFiles
                                 display.Height = height;
                         }
 
+                        // Set the refresh
+                        if (reader.GetAttribute("refresh") != null)
+                        {
+                            if (Double.TryParse(reader.GetAttribute("refresh"), out double refresh))
+                                display.Refresh = refresh;
+                        }
+
                         // Set the pixclock
                         if (reader.GetAttribute("pixclock") != null)
                         {
@@ -1597,7 +1603,7 @@ namespace SabreTools.Library.DatFiles
                         xtw.WriteOptionalAttributeString("flipx", display.FlipX.FromYesNo());
                         xtw.WriteOptionalAttributeString("width", display.Width?.ToString());
                         xtw.WriteOptionalAttributeString("height", display.Height?.ToString());
-                        xtw.WriteOptionalAttributeString("refresh", display.Refresh);
+                        xtw.WriteOptionalAttributeString("refresh", display.Refresh?.ToString("N6"));
                         xtw.WriteOptionalAttributeString("pixclock", display.PixClock?.ToString());
                         xtw.WriteOptionalAttributeString("htotal", display.HTotal?.ToString());
                         xtw.WriteOptionalAttributeString("hbend", display.HBEnd?.ToString());
diff --git a/SabreTools.Library/DatFiles/SabreDat.cs b/SabreTools.Library/DatFiles/SabreDat.cs
index b727991a..a4c45155 100644
--- a/SabreTools.Library/DatFiles/SabreDat.cs
+++ b/SabreTools.Library/DatFiles/SabreDat.cs
@@ -1441,7 +1441,7 @@ namespace SabreTools.Library.DatFiles
                         xtw.WriteOptionalAttributeString("flipx", display.FlipX.FromYesNo());
                         xtw.WriteOptionalAttributeString("width", display.Width?.ToString());
                         xtw.WriteOptionalAttributeString("height", display.Height?.ToString());
-                        xtw.WriteOptionalAttributeString("refresh", display.Refresh);
+                        xtw.WriteOptionalAttributeString("refresh", display.Refresh?.ToString("N6"));
                         xtw.WriteOptionalAttributeString("pixclock", display.PixClock?.ToString());
                         xtw.WriteOptionalAttributeString("htotal", display.HTotal?.ToString());
                         xtw.WriteOptionalAttributeString("hbend", display.HBEnd?.ToString());
diff --git a/SabreTools.Library/DatItems/Display.cs b/SabreTools.Library/DatItems/Display.cs
index c7dbed57..294d133c 100644
--- a/SabreTools.Library/DatItems/Display.cs
+++ b/SabreTools.Library/DatItems/Display.cs
@@ -58,7 +58,7 @@ namespace SabreTools.Library.DatItems
         /// Refresh rate
         /// </summary>
         [JsonProperty("refresh", DefaultValueHandling = DefaultValueHandling.Ignore)]
-        public string Refresh { get; set; } // TODO: Float?
+        public double? Refresh { get; set; }
 
         /// <summary>
         /// Pixel clock timer
@@ -144,7 +144,10 @@ namespace SabreTools.Library.DatItems
             }
 
             if (mappings.Keys.Contains(Field.DatItem_Refresh))
-                Refresh = mappings[Field.DatItem_Refresh];
+            {
+                if (Double.TryParse(mappings[Field.DatItem_Refresh], out double refresh))
+                    Refresh = refresh;
+            }
 
             if (mappings.Keys.Contains(Field.DatItem_PixClock))
             {
@@ -313,9 +316,9 @@ namespace SabreTools.Library.DatItems
                 return false;
 
             // Filter on refresh
-            if (filter.DatItem_Refresh.MatchesPositiveSet(Refresh) == false)
+            if (filter.DatItem_Refresh.MatchesPositive(null, Refresh) == false)
                 return false;
-            if (filter.DatItem_Refresh.MatchesNegativeSet(Refresh) == true)
+            if (filter.DatItem_Refresh.MatchesNegative(null, Refresh) == true)
                 return false;
 
             // Filter on pixclock
diff --git a/SabreTools.Library/Filtering/Filter.cs b/SabreTools.Library/Filtering/Filter.cs
index 161bf09a..08093981 100644
--- a/SabreTools.Library/Filtering/Filter.cs
+++ b/SabreTools.Library/Filtering/Filter.cs
@@ -201,7 +201,7 @@ namespace SabreTools.Library.Filtering
         public FilterItem<bool?> DatItem_FlipX { get; private set; } = new FilterItem<bool?>() { Neutral = null };
         public FilterItem<long?> DatItem_Width { get; private set; } = new FilterItem<long?>() { Positive = null, Negative = null, Neutral = null };
         public FilterItem<long?> DatItem_Height { get; private set; } = new FilterItem<long?>() { Positive = null, Negative = null, Neutral = null };
-        public FilterItem<string> DatItem_Refresh { get; private set; } = new FilterItem<string>();
+        public FilterItem<double?> DatItem_Refresh { get; private set; } = new FilterItem<double?>() { Positive = null, Negative = null, Neutral = null };
         public FilterItem<long?> DatItem_PixClock { get; private set; } = new FilterItem<long?>() { Positive = null, Negative = null, Neutral = null };
         public FilterItem<long?> DatItem_HTotal { get; private set; } = new FilterItem<long?>() { Positive = null, Negative = null, Neutral = null };
         public FilterItem<long?> DatItem_HBEnd { get; private set; } = new FilterItem<long?>() { Positive = null, Negative = null, Neutral = null };
@@ -855,7 +855,7 @@ namespace SabreTools.Library.Filtering
                     break;
 
                 case Field.DatItem_Refresh:
-                    SetStringFilter(DatItem_Refresh, value, negate);
+                    SetDoubleFilter(DatItem_Refresh, value, negate);
                     break;
 
                 case Field.DatItem_PixClock:
@@ -1056,6 +1056,64 @@ namespace SabreTools.Library.Filtering
                 filterItem.Neutral = true;
         }
 
+        /// <summary>
+        /// Set a long? filter
+        /// </summary>
+        /// <param name="filterItem">FilterItem to populate</param>
+        /// <param name="value">String value to add</param>
+        /// <param name="negate">True to set negative filter, false otherwise</param>
+        private void SetDoubleFilter(FilterItem<double?> filterItem, string value, bool negate)
+        {
+            bool? operation = null;
+            if (value.StartsWith(">"))
+                operation = true;
+            else if (value.StartsWith("<"))
+                operation = false;
+            else if (value.StartsWith("="))
+                operation = null;
+
+            string valueString = value.TrimStart('>', '<', '=');
+            if (!Double.TryParse(valueString, out double valueDouble))
+                return;
+
+            // Equal
+            if (operation == null && !negate)
+            {
+                filterItem.Neutral = valueDouble;
+            }
+
+            // Not Equal
+            else if (operation == null && negate)
+            {
+                filterItem.Negative = valueDouble - 1;
+                filterItem.Positive = valueDouble + 1;
+            }
+
+            // Greater Than or Equal
+            else if (operation == true && !negate)
+            {
+                filterItem.Positive = valueDouble;
+            }
+
+            // Strictly Less Than
+            else if (operation == true && negate)
+            {
+                filterItem.Negative = valueDouble - 1;
+            }
+
+            // Less Than or Equal
+            else if (operation == false && !negate)
+            {
+                filterItem.Negative = valueDouble;
+            }
+
+            // Strictly Greater Than
+            else if (operation == false && negate)
+            {
+                filterItem.Positive = valueDouble + 1;
+            }
+        }
+
         /// <summary>
         /// Set a long filter
         /// </summary>