B1 VR 40 ton Cast Steel, square axle box lid, disc wheels.
- Moulded in one piece from acetal plastic.
- Wheels are to NMRA RP25 code 99 profile and HO gauge, from the standard SEM range of wheelsets.
- All wheelsets are insulated for 2 rail pickup.
- Disc wheels have injection moulded acetal centres or bushes on one side only.
- Wheelsets are non-magnetic, with pinpoint brass axles and chemically blackened tyres.