The complete assembly is supplied as a single high-quality engineering resin print, making installation quick and straightforward. Features Designed for O Gauge (7mm Scale / 1:43.5) Suitable for later BR Class 81 locomotives Designed directly from original BR engineering drawings Three accurately proportioned roof-mounted air reservoirs Integrated pipework and mounting framework Electrical equipment housing included High-quality engineering resin print Crisp, finely reproduced detail Simple installation onto your locomotive roof Supplied Complete roof air reservoir assembly Three air tanks Integral mounting frame Pipework As shown in the photographs