The Hornby X2240/1 X515/6 Con Rods Valve Gear Set is a vintage part made of pressed steel specifically designed for the R084 Princess Class model in 1:76 scale. This pre-built set is compatible with Hornby brand analogue control systems, perfect for recreating the era of the Big Four railways in the United Kingdom. The silver colour and OO gauge make it a collectable piece for model railway enthusiasts looking to add authenticity to their layouts from the 1920s to 1947.