Phoenix Contact 1602998 The M23-PRO series has specific contact configurations that include crimp contact and socket, with single contacts available in a diameter of 1mm. The recommended crimp range is between 0.5mm² to 1mm². Notably, the Contact Release Tool is not required for certain versions (12- and 17-pos) of this series, whereas an alternative product meeting RoHS II standards with <0.1% Pb content is available under item no.: 1241572.