ASI 3016922 Multiple Wire Entry Seal for Cable Glands, Type 36A3M2034, 3 Wire Holes with 4 mm Hole Diameter, M20, PG 13.5, PG 16, Black (Pack of 100) : Amazon.co.uk: Business, Industry & Science
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British General Plastic Cable Gland Kit 32mm - Screwfix
Plastic Cable Gland For 3 - 5 mm Dia. Cable | 12 Volt Planet