Cartridge Style Filter, Cold Water, Size 1/2 In, Color Blue, Max. Temp. 140 F, Max. Pressure 100 PSI, 2 Max. Flow GPM, Polypropylene Head Material, SAN Plastic Housing Material, For Use With OF220RM, Standards W-512, NSF, ANSI 42 And 61, DVGW RestrictionsCalifornia Proposition 65 Warning: This product contains a chemical known to the State of California to cause cancer. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. OneFlow Anti-Scale Cartridge SystemsInstall each cartridge-based system on a cold water line, prior to a water-using device. Protect against scale and other hard water damage, with no backwashing, salt, or electricity. Ideal for use with water heaters, hot-beverage systems, appliances, and steamers.Meet W-512, NSF, ANSI 42 and 61, and DVGW standards.Santoprene plastic housing; polypropylene heads Max. pressure: 100 psi Max. temp.: 140 F