【SIZE】Length:7"; Outer Dimension: 5-3/8"; Top: semi-circular handle; Bottom: 3"male thread MPT; Filtration Area: 20 sq.ft. 【COMPATIBLE MODELS】Compatible with PLAS35 LA Spas, PLAS20, 5CH-203, FC-0303, FL-0303, 20 Sq. Ft Spa Filter Cartridge. Note: The manufacturer’s name and part number have been used for reference purposes only. CRYSPOOL is an independent brand. 【QUALIFIED MATERIAL】The advanced material of trilobal fibers is utilized. Cutting-edge technologies make the capacity higher than common point-bond fabric. It makes water process more thoroughly and service life longer. 【EASY CLEANING】The Improved Trilobal Fabric Filter Structure enables the deep penetration of impurities into filter pleats when we wash it, the filter is a totally brand-new one after cleaning. It’s recommended to clean the filter when the pressure gauge reaches the predetermined value, so as to take full advantage of its performance. 【GOOD CHOICE FOR FILTERS】With our qualified material, end caps as well as pleats, the filters are easy to clean, strong to filter, sturdy to hold in position. If cleaned regularly more often, its service life can be largely enhanced, the water usage will also be largely minimized. Hot Tub Filter Compatible with LA Spas, 5CH-203, FC-0303, PLAS35, PLAS20, FL-0303, 20 Sq. Ft Spa Filter Cartridge, 2 Pack