Over 1342 of these were built between 1904 and 1925. Some lasted until the 1960s. These were larger than most 4 wheel merchandise wagons giving increased capacity, with an improved tare weight : load weight ratio, although most were later down-rated to 12 tons. 20 wagons were converted to grain wagons in the 1930s – see "More" below.
The kit has "one piece" solebars and floor. The sheet rail is optional – later wagons, including the SR-built ones, didn't have sheet rails. The buffers are separate mouldings, making it easier to fit sprung buffers if required.
The kit can be assembled with or without the sheet rail and "door controller" arm – both the "without" options need the mounting plates to be cut off the body. Single lever brakes can also be modelled.

Extra top doors with diagonal braced hinges are included, but the wagon sides will need the top door section cut out to fit the door variation (see 2nd smaller picture).