The DREHMEISTER hose coupling is made of high-quality aluminium. It is used to connect 16mm cooling water hoses. The protruding 21mm ring in the middle piece serves as an attachment point for both hoses and ensures a safe and even connection. There are also additional sliding edges with 1.5mm protrusion at both ends to prevent the hose from slipping. Afterwards the hose must be fixed with a screw or clamp provided for this purpose.