25 Sq Filter with 1.5" MPT 40257 or PFF25P4 4CH-22 as used in FreeFlow spas FF-150 and other brand hot tubs. 6 5/8" x 4 15/16" with 1 1/2 inch mpt fine threads on bottom and 2 1/8" ID hole on top...
4CH-925 Filter Strong Spas Canada 4CH-925 is 7 1/4 inches long and 4 5/8 inches wide with 1 1/2 inch SAE course threads on bottom and a top handle. Diameter: 4-5/8" Length: 7-1/4" Top: Handle Bottom:...
20 Sq Ft Filter with 1.5" MPT 40201 4CH-20 as used in Soft Tubs, Vita Spas and Master Spas. Diameter: 4-5/8" Length: 6-3/4" This filter cartridge has a cone shaped top handle.