Original Equipment MasterSpas Filter Cartridge. The Twilight & Legend Canister Filter is used on all MasterSpas Twilight Series and Michael Phelps Legend Series Spas from 2017 to current, with the exception of the triangle shaped TS240. It is also used on the Therapool SE and Therapool D swim spas from 2017 to 2024. This canister filter is embossed with "PMA-40L" and is a direct replacement for earlier model filters marked PMA40L F2M and also X268365. Replacement parts from the manufacturer guarantee an exact fit and match, and are the best quality replacements available. Master Spas is currently doing a rolling change with OEM Filters. You may receive the blue filter (pictured) until inventory is depleted, or you may receive the new Master Clear Filter which will be grey in color. Rest assured, they are both the same filter, and they are both OEM, and supplied directly from MasterSpas. PR* FILTER, WHT 40SQ LONG
