supply of guages , digital dial indicator range with magnetic base holder range 0-10 mm resolution 0.001 mm with calibration certificate traceable to national standard make-mitutoyo/tesa/forbes or equivalent [ w arranty period: 30 months after the date of delivery ] ] , snap gauge range 125-150 mm lc 0.001 mm with a digital dial indicator and standard ring f or outside measurement [ warranty period: 30 months after the date of delivery ] ] , thread profile ring gauge (go - 01 no. & nogo - 01 no.), required size: m39 x 3 mm (exter nal), wear limit - 1mm ref. drg. no. rdso sk 79063 alt-4 & sk 99007 material - tool steel, is 3748/90 har dness - 50/55 hrc. supply with calibration certificate [ warranty period: 30 months after the date of deli very ] ]