Sierra Shields #1600 Water/Heater Hose 3/4"Sierra Shields 1600 Water/Heater Hose has a good bend radius, fabric reinforced & has an EPDM tube & cover. It is resistant to mild chemicals, heat, cold, ozone, and saltwater.Specifications: Wt. "C": 34; I.D.: 3/4" or 19.1mm; O.D.: 1 9/64" or 28.8mm; Working Pressure: 300 PSI; The temperature ranges from -40F - +190F; Applications: This hose is primarily used for critical water connections, heat exchanger, toilet intake; Also used for small engine intake, bilge pump intake/discharge, & below water line drains & scuppers;