Clear Exterior: Vision Tap transparent design lets users see their work to ensure ideal conductor placement and the most secure connection Dual-Sided Wire Entry: Form secure connections between 4 conductors quickly using the double-side entry ports sized for wires between 500 MCM and 4 AWG Ergonomic Design: Rounded corners and a smooth exterior finish over the abrasion-resistant plastisol insulation make Polaris connectors comfortable to grip Pre-filled Oxide Inhibitor: All 4 dual-sided (DSE) entry ports are covered by removable plugs and pre-filled with an oxide inhibitor gel to protect against corrosion, debris or moisture Parallel Rated: This connector is specifically designed and rated for parallel installation, providing a safe and secure way to handle larger projects