Sta-Rite S8M150 System:3 Modular Media SM Series Pool Filter, 450 Square Feet, 50-124 GPM System 3 modular media SM-Series cartridge filter Filter has 450-square feet effective filter and 2-inch tank port size Durable two-piece tank housing constructed of Dura-Glas, Sta-Rite industry leading glass-reinforced composite resin Posi-Lok clamps provide safe, easy access to tank internals Measures 31-inch length by 41-1/2-inch height by 30-1/2-inch width