... KEYMARK,SRCC,CE 2.Antifreezing -40 degree 3.OEM provide Split Pressurized solar thermal system1,Size:58/1800,47/1500 2 ... : 1.0 mm, Hole spacing: 75mm, max operation pressure 6 bar, phosphor copper brazingEnd CoverNylonDust RingSilicone Rubber 110Tube holderNylon 66FrameFrameAluminum alloy ...