The Hornby OO Gauge Diesel R3950A GBRF CO-CO CLASS 66 is a ready-to-go pre-built model of a British Rail Class 66 diesel locomotive in a brown colour. It is a 1:76 scale replica made of plastic, featuring a Co-Co wheel configuration and analogue control system. This model is designed for use on an OO gauge two-rail system and represents the post-privatisation era of railways in Britain. With its detailed design and brand authenticity, this Hornby locomotive is a perfect addition to any model railway enthusiast's collection. NOTE: In mint boxed condition. unfortunately I have no layout for testing it but working perfectly fine a year or so ago just been on the shelf since then.