Wiska Waterproof 20mm Cable Gland For 2.5 - 4mm Twin and Earth T&E Cables X 5
5 x Grey Cable Gland to fit into M20 20mm Knockout Holes. Special Rubber Seal inside the glands, designed to fit snug around a 2.5mm or 4mm Twin and Earth Cable. Creates a waterproof seal around twin and earth cable entries.