supply of three point wheel diameter gauge , three point wheel diameter gauge (digital type) to measure bg railway wheel diameter in situ as well as in loose condition. technical specifications: measurement range: 600 mm to 1200 mm, ac curacy: +/-0.3 mm (for tread with surface finish n7 to n8 or better), resolution: 0.01 mm, measurement fro m edge: 63.5 mm, distance between ball axes: 250 +/- 0.5 mm, display type: digital display, weight: 900 grams maximum, power supply: rechargeable battery operated, measurement principle: 3-point measurem ent of wheel curve outside diameter [ warranty period: 12 months after the date of delivery ] ]