The MK K5212ALM is an Aluminium, 20A, 1 Gang, Double Pole switch. It comes complete with a back box with 6 20mm knockouts, two in one side, three in the other three sides and one in base. It has an Earth terminal fitted in the back box. The MK Metalclad Plus Range is made from heavy gauge steel making it a very tough set of products. This means they are ideal use in factories, workshops, garages and sheds. · · · Current rating 20A · · No. of poles 2 · · No. of poles 2 · · Fixing Centres 60.3mm · · Switched/Unswitched: Switched · · Knockouts: 5 x 20mm – two in one side and one in each of the other three sides · · All units are supplied with backboxes · · Frequency 50/60 Hz · · Voltage 230 V