Slim design reduces space required for installation without sacrificing capacity FDA grade Leak-proof sealing with top-seated Buna-N O-ringSlim Line filter housings are available in either reinforced polypropylene. The reinforced polypropylene housing caps are available with 3/8" NPT connections. Four bosses are molded into every cap for mounting purposes. Excellent for low-flow applications and when space and chemical compatibility are primary concerns.OPAQUE SLIM LINE HOUSINGSMolded from rugged reinforced polypropylene, these housings are ideal for under-sink and countertop residential filtration, pre- and post-reverse osmosis filtration, recreational vehicle filtration, food service, humidifying systems and light commercial and industrial filtration.Materials of Construction Housing: Styrene Acrylonitrile (Clear) and Polypropylene (Opaque) Cap: Reinforced Polypropylene Button Assembly: 300-series Stainless Steel, Polypropylene and EPDM O-Ring: Buna-N Maximum Temperature: 125�F (51.7�C) Maximum Pressure: 125 psi (8.62 bar) Maximum Dimensions: 11-3/4" x 4-3/8" Initial �Pressure (PSI) @ Flow Rate (GPM): 2 PSI @ 5 GPM