Guardian Pool Spa Filter Replaces PA50SV,Unicel C-7447, FC-1235, Hayward Swimclear C2025, Swimquip, Sta-rite Replaces Pleatco PA50SV | Unicel C-7447 | Filbur FC-1235 Diameter: 7"  Length: 14 3/16"  Top: Open Hole 3"  Bottom: Open Hole 3" Filter Area: 50 sq ft Filter Material: Reemay (3 oz/yard) Used in pools / spas made by Hayward | Pentair Pool Products | Sta-Rite | SwimQuip