Wrench For Water Purifier 10/20 Inch Fat Filter/Cartridge Housing Part # 900432
 
 
Fits all standard 10/20 Inch Fat water filter housings.
Inside Dimensions 4 1/2" and 4 1/8" (See photo)
Easy to carry: Lightweight and compact
Material: Made of high grade PP material, durable.
Function: Slips onto the filter housing to aid in the replacement of filter cartridges.