Maintance Kit-see desc for what is incl Height 11-3/8", Width 9-7/8", Inside Depth 1-3/4", Outside Depth 2-3/4". Includes the following-- Water Panel 10 Scale Control Insert 4217 Water Distribution Tray 4218 Feed Tube and Compression Sleeve 4226 Orifice 4231 Drain Spud 4223 Nozzle 4184 Inline Strainer 4004 Owners Manual