Filters for Catalina & Carribbean hot tub.

Filters for Catalina & Caribbean tubs.

PRB 17.5 SF (pair) - each measures 4 5/8" (117mm) long x 5"(127mm) diameter with 2 1/8" (53mm) holes top and bottom. Pleatco Ref PRB17.5SF, Unicel Ref C-4401, OEM number 17-2606.

PRB 25 SF (pair) - each measures 6 5/8"(167mm) long x 5"(127mm) diameter with 2 1/8" (53mm) holes top and bottom, Pleatco Ref PRB 25 SF, Unicel Ref C-4405, OEM number 17-2664.

PWW 50 - each cartridge measures 9 1/4" (235mm) long x 6"(152mm) diameter with a posi-grip top handle, 1.9" (48mm) base slots. Pleatco Ref PWW 50, Unicel Ref: 6CH-940, OEM number 8170050.