... fitting 1.Type: JJC 2.ISO-9001 certificate Products UseJJC series piercing connectors are suitable for low-voltage insulated circuitries, used ... insulation case, it has the self-sealing structure, whose character is damp-proof, water proof, corrosion-proof, prolonging the life ... and long-time stable operation.4.Moment nut, piercing pressure is constant, keep good electric connection and make no damage ...