Fused spur connection unit with support ring 71 x 71 mm

British Standard Fused spur connection unit (BS 1363-4) 13 A 250 V~ switched
System 55

British Standard fused spur connection unit (BS 1363-4) 13 A 250 V~ switched, with control light 
System 55

British Standard Fused spur connection box (BS 1363-4) 13 A 250 V~ not switched
System 55