The Straub Metal Grip is the ultimate pull-out resistant (axial restraint) pipe coupling for all plain-ended metal pipes, for outstanding performance in applications of higher pressures and temperatures. Pull-out resistant (axial restraint) pipe coupling for all metal pipes to meet the highest standards Diameter 30.0 to 609.6 mm SS 304 or galvanised steel EPDM and NBR sealing sleeves IACS Tested and Approved