ASI 3016920 Multiple Wire Entry Seal for Cable Glands, Type 36A3M2025, 2 Holes with 5 mm Diameter, M20, PG 13.5, PG16, Black (Pack of 100) : Amazon.co.uk: DIY & Tools
M50 Cable Gland 2-Hole Waterproof IP68 Seal Nylon Lock Nut for 13-15 mm Diameter : Amazon.de: DIY & Tools
NCG-M25/2x5.7 | Matelec 25mm Multi-Hole Nylon Cable Gland With 2 x 5.7mm Hole