Ring shape according to DIN 46237 and similar , For fine and extra fine wire conductors , Cu-ETP according to DIN EN13599, soldered, galv. Sn , With expanded PA insulation -easy entry- , Continuous temperature range: -55°C to 105°C , Insulated , Halogen-free , Flange shape: Ring shape , PQKR 0.5-1.0: Color red , PQKR 1.5-2.5: Color blue , PQKR 4.0-6.0: Color yellow , Suitable tool: Crimping pliers PCIK