The Splash 16 ST-230 R is a compatible replacement for the following spa filters:
The Splash Tub ST-230 Comp. Pool Filter - 16 Square Ft is a pool filter cartridge measuring 4 15/16" x 5 1/2" and featuring media area of 16 sq. ft. This compatible Splash Tub filter is manufactured with a Closed Knob Handle top style and 1 9/10" Open bottom style with Slots. This spa filter cartridge maintains high quality swimming pool and spa water.