Item Description: wheel diameter gauge with digital display for measurement of wheel diameter in both mounted (in- suit) and un-mounted wheels of coaches during maintenance. the gauge gives direct readings on a digital display. make: pie/ bpi/ tesa. detailed specification of item: 1. measuring range 600 to 1200 mm, 2. applicability: bg wheel, 3. least count: 0.1 mm, 4. measuring accuracy: plus/minus 0.3 mm (for tread with surface finish n7 to n8 or better) & plus/minus 1.5 mm (for tread with surface finish n9 to n11), 5. recording of reading: to be provided, 6. display: built in led, 7. weight: 750 gms (approx.), 8. power supply: inbuilt rechargeable battery. the gauge is to be supplied in standard storage box with carrying handle & battery charger. warranty certificate & product manual to be supplied along with the instrument.