... ,like delivery pipe,elbow,coupling,fitting schwing,PM, 90 degree bendThis is the brief introduction of our products: ... , (coupling)clamp , male and female flange ,rubber hose,cleaning ball,wear plate etc. Welcome to contact us ... 125mm or DN 150mm (R275,R225,R315,etc)degree:90, 60,45,30,15 3. concrete pump coupling ... request 6.rubber items( adopt natural rubber) rubber hose:DN 125mm and DN 150mm ,3 or 4 ...