Trailer adaptors to convert between 7 pin flat, 7 pin round, large round, 12 pin and 13 pin Euro plugs, from West Coast Trailer Parts in Perth. Changed tow vehicles or bought a trailer with a different plug? An adaptor lets you connect without rewiring. Elecbrake adaptors are available for brake controller setups. See our plugs and sockets and electric brakes, or call (08) 9274 2429.