... anti-UV plastic 4.after-sale letter of quality commitm Insulation Piercing Connector features1)Simple installation, small contact resistance and low temperature ... Moment nut, piercing pressure is constant,keep good electric connection and makeNo damage to lead.5)Self-seam frame,waterproof,waterproof,and anti ... diameter, wideconnection scope (0.75 mm2-400 mm2) low voltage insulation piercing connectors