The Avonside Engine Company offered a range of standard narrow gauge tank locomotives that could be ordered with various gauge and cylinder diameter combinations. In order to ensure a long service life and low wear, some assemblies were made of harder steel than actually required and the friction surfaces on wear-intensive parts were made wider.

One of the types had the wheel arrangement 0-6-2T and was successfully exported to South America and India. The example shown was built for the gauge of 2 feet and 6 inches and had cylinders with a diameter of 12 and a stroke of 18 inches. Variants with cylinder diameters ranging from nine to fourteen inches were available for the same gauge. For the 2 feet gauge, cylinders with a diameter of between nine and twelve inches were provided.