Cable Gland Size Calculation: Ultimate Guide for your Work
Kit of 2 CW20s Cable Glands for SWA Armoured Cable (Suitable for Outdoor Use) Ideal for Use with Outdoor Sockets and Junction Boxes (M20s) : Amazon.co.uk: DIY & Tools
SWA EIW20/16PACK Cbl Gland Pk=2 20/16mm
16mm 3 Core Armoured Cable - Cut to length, price per metre