This starter pack contains a fret of 40 ACN/3 delayed action autocouplings and mounting plates for use in 2mm scale. They have also been successfully used on 009 stock. Also included are 2m of BW brass wire, 1m of SIW4 soft iron wire, and 6 2MAG permanent magnets. A cheaper trial pack (T/ACN/3) is also available, with eight couplings and mounting plates, wires and one permanent magnet.
The actual size of the fret is 91½ x 99½mm; it is etched in 0.012″ brass. Each coupling is 16½mm long and 5½mm wide; the mounting plates are 4 x 12mm. The magnets are 14mm long, 10mm wide and 4mm deep.