The Hornby R8211 Rolling Road is designed for most 12V DC electric locomotive models and is compatible with both standard Hornby 12V DC and Live Steam 17V DC power supplies. It measures 348mm in length and includes three pairs of adjustable rollers, along with a bogie block that adjusts within an 85mm range. Additional roller pairs (R8212) are available separately to accommodate locomotives with eight or ten coupled wheels. Please note, this product is not suitable for models with drive to both bogies if the wheelbase exceeds 157mm. Locomotive is not included. Expand your layout with accessories, platforms, track, bridges, tunnels, and Skaledale items.