Injection moulded Vinyl with a funnel entry. High-quality Butted construction, pre-insulated with polyvinyl chloride (PVC) sleeve. Insulation is colour-coded to NEMA standards and flared for easy insertion of both stranded and solid wire. PVC insulation provides support for the wire to avoid flexing at the point of crimp. The forked tongue permits convenient assembly and disassembly without the complete removal of the connection screw.