Masterplug RCD 20m 4 Socket Cable Reel HBT2013/4BLRCD. This 20 metre, four socket case reel in blue is ideal for extending all your power needs. The cable is protected by the outer plastic casing which enables convenient and safe storage. Tough, robust design is practical and the handle allows easy transportation and flat base enables reel to stand up. Available with and without RCD plug.