Phoenix Contact 1596772 The contact types mentioned are crimp contact, socket, single contact, and they have a specified contact diameter of 1 mm. The recommended crimp range is between 0.08 mm² and 0.22 mm². For certain models in the M23-PRO series, such as the 12- and 17-pos versions, a contact release tool is not required. Instead, an alternative product that complies with RoHS II regulations without containing more than 0.1% lead is available under item number 1241093.