The BW25 SWA Cable Gland is suitable for 1.5mm 19 Core, 1.5mm 27 Core, 2.5mm 10 Core, 2.5mm 12 Core, 2.5mm 19 Core, 4mm 7 Core, 4mm 10 Core, 4mm 12 Core, 6mm 5 Core, 10mm 3 Core, 10mm 4 Core, 10mm 5 Core, 16mm 2 Core, 16mm 3 core, 16mm 4 Core, 25mm 2 Core & 25mm 3 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 BW25 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.