The fused connection units - spurs - are used to connect permanent appliances (like the washing machines, single ovens, dishwashers, extractor hoods and fans, etc) to the electrical circuits of the house. They are also called "spurs" - they are not a socket; a FCU (fused connection unit) "diverts" the electricity to an electrical appliance. It has to have a fuse, otherwise the 32A electrical current taken from the consumer unit can melt the cable, and this can cause a fire. The 13A spurs are in a brushed steel finish(also called brushed chrome finish, stainless steel finish or satin nickel finish).
SBS52 - 13A switched fused connection unit with neon, flat switched spur, stainless steel, with neon light. The most competitive prices for fused connection unit (FCU) with neon, online; the metal rocker has no surround.
SBS53 - 13A switched fused connection unit with neon and cable outlet, flat plate spur with neon and Flex Out. Unswitched metal fused connection unit (spur), screwed, with cable outlet; fashionable design, no surround around the rocker.
SBS54 - 13A unswitched fused connection unit - stainless steel flat plate un-switched spur. Fused Connection Unit without a switch (unswitched) - nice design at most competitive prices, no rim around the spur.
SBS55 - 13A unswitched fused connection unit with neon and cable outlet - Unswitched spur with flex out, stainless steel. Inexpensive yet nice fused connection unit without a switch (un-switched); has an outlet for the cable.