Add to Cart Quick view SALE DARLLY FILTRATION, INC. Master Spas Cartridge 30sqft 7"dia, 7-1/4"L (removable top) Micro Filter $59.99 $51.95 Application Master Spas Bottom Physical Dimension 2" Bottom Style Male Pipe Thread (mpt) Diameter 7" Length 7-1/4" Media Type 3oz Square Footage 30 sq... Add to Cart Add to Wishlist