Screw on Wire Connectors RoHS,CE Certificate(Wire Connectors,wiring joints) Screw on Wire Connectors 1) Material: extruded PVC fire-resistant material, UL Approved Nylon 6.6, 94V-2.2) Inner assembled with spring square steel wires.3) Easy for wire entrance and eliminates wire strands hang up.Packing: 1000pcs/bag (Wire Connectors,wiring joints) Screw on Wire Connectors