Description:? Pentek ECP20-20 Pleated Cellulose Water Filter Cartridge Specs: Dimensions: 20" x 2-5/8" (508 mm x 67 mm) Micron Rating (Nominal): 20 Micron Temperature Rating: 40F to 125F (4.4C to 51.7C) Initial ∆P (psi) @ Flow Rate (gpm): Pentek ECP20-20 Sediment Filter Materials of Construction: Filter Media: Cellulose Polyester Core: Polypropylene End Caps: Vinyl Plastisol