... wet shotcrete machineor other machine's pipe conection.This is the consumption components of Shotcrete machine.Quick Coupling,coupling lathe,coupling part Casting ... steel ,tool steel ,brass and aluminum ,according to DIN ,EN, ASTM, BS,JCSI.Piece numbers: small, medium and large series.Process ... : According to ISO 9001 2001Features:ReliableSuper-qualityLong-duration Quick Coupling of Rubber Hose