Set of 4 Coach axle box's as used on our range of 1873 built coaches. The distance between the spring mounts is 54mm on the larger (LSWR coach) axles and 43 on the smaller (L & C) coaches. The hole in the back suits O gauge brass bearings and the larger axles are available either with right angle brackets at the top for nut and bolt mounting on the floor of your coach or flat sided to glue to the inside of the solebar. The cutaway on one end of the mounting plate is to allow room for sprung buffers.