... 4" 2) standard: BS, ANSI, DIN, JIS 3) with socket and threaded end 4) material: U-PVC 5) colors: Many colors ... available for choice 6)Health and non-toxic 7) Heat, corrosion resistance without fouling 8) Insulation ... to operate 2)Applicable to the regular operation , open and close quickly ,lightweight 3)No vibration and no noise 4)Quality : Heat ,durableApplication: Applies ...