supply of digital outside micrometer rangedigital outside micrometer range,digital outside micrometer range: 300 - 400 mm, least count: 0.001mm, code no. 340-520 of m/s. mitutoyo make or its equivalent in insize/baker/ forbes/precision. features:- (1) wide measuring ra nge with interchangeable with anvils. (2) measuring face of the spindle is carbide tipped. (3) ip 65 water /d ust protection. (4)equipped with ratchet stop for constant measuring force. (5) oil resistant material used f or all plastic parts. (6)extended battery life of approximately 2.4 years. make- insize or similar. [ warrant y period: 30 months after the date of delivery ] ]