The Hornby X820 Cylinder Block is a vintage collectable part designed for the Morning Star Class 7MT Loco model, specifically the Britannia compatible model. Made of black plastic in a 1:76 scale, this cylinder block is a genuine Hornby product manufactured in the United Kingdom. Perfect for model railway enthusiasts looking to replace or upgrade parts on their OO gauge locomotives, this vintage accessory adds a touch of authenticity and nostalgia to any railway layout.