The Molex avikrimp snap plug receptacle for 18-22 AWG wire. It has insulation made up of nylon with fits male plug diameter 3.96mm, mylar tape carrier.Barrel type closedColor - Resin RedFlammability 94V-2Gender femaleGlow-Wire Capable NoInsulation nylon (PA)Wire insulation diameter 3.25mm maxWire size AWG 18, 20, 22