Kit Contains a single set of etched brass MK 3 overlays to model either 977993 or 977994 from the New Measurement Train (NMT). Use this kit to add 977994 to Hurst Models kit CK3400 or add 977993 to CK3401. Kit requires a Hornby correct length MK 3 TSO or FO coach. Full instructions enclosed. Please note the kit does NOT include pantograph well parts or pantograph for 977993. The conversion is designed for the Hornby MK 3 coach only.