The BW75 SWA Cable Gland is suitable for 300mm 4 Core, 400mm 3 Core & 400mm 4 Core Armoured Cable. An Armoured Cable Gland is primarily used for inserting a length of cable into a device or piece of electrical equipment, whilst maintaining a safe and tight seal to provide a variety of benefits, including: Sealing and Retention, Earthing/Grounding, Bonding & Insulation. The Indoor BW75 Armoured Cable Glands are, as indicated by the name, intended for indoor use, meaning they are not strictly waterproof or protected against environmental effects such as rain and snow, as they are with Outdoor CW Glands. All the Armoured Cable Glands that we stock and supply are designed and made to the British Standard of BS6121, meaning they are safe and have been thoroughly tested to ensure their integrity. This pack contains: 2 Glands, 2 Locknuts, 2 PVC shrouds, 2 Earth tags Brass indoor gland suitable for single wire armoured, plastic or rubber sheathed cable. Recommended to use with shroud for additional ingress protection. Earth tag to be used for earth continuity. M20 Thread Size This product is intended for indoor use only. The BW75 Gland Is suitable for use with Armour Cable Size: 300mm 4 Core 400mm 3 Core, 400mm 4 Core If you require a cable gland for outdoor use, please see the CW75 Outdoor Cable Gland Kit.