Name: Konfix Rubber connectors Size:DN50-DN150 German Approval no.: Z-42.5-299. Torque: ca. 2 Nm Material:Gasket Epdm Material locking parts: W2, worm thread clamp stainless steel 1.4016,screw free of chrome Application: For connecting SML pipes and fittings with other Sml Cast Iron Pipe systems(materials) Cast Iron Drainage Pipe