This is a Brass Cable Gland (Type E1W), designed for use with armoured cables in both indoor and outdoor applications, including wet or corrosive environments. It provides a weatherproof and flameproof seal at the cable's inner sheath, along with mechanical support and earth continuity via the armouring. The E1W gland includes a sealing washer and neoprene or rubber ring for enhanced ingress protection. It is widely used in industrial, marine, and hazardous area installations where safety and durability are essential.