supply of set of three points digital inside micrometer with setting (calibrating) ring and extension rod for each item, range: (1) 50-70 mm, l.c.: 0.001mm. (2) 70-100 mm, l.c.: 0.001mm., (3) 100-150 mm, l.c.: 0.001mm., one set consist of three items. make: mitutoyo or insize or iti or mahr or starrett or bowers only.set of three points digital inside micrometer with setting (calibrating) ring and extension rod for each item, range: (1) 50-70 mm, l.c.: 0.001mm. (2) 70-100 mm, l.c.: 0.001mm., (3) 100-150 mm, l.c.: 0.001mm., one set consist of three items. make: mitutoyo or insize or iti or mahr or starrett or bowers only.,set of three points digital inside micrometer with setting (calibrating) ring and extension rod for each item, range: (1) 50-70 mm, l.c.: 0.001mm. (2) 70-100 mm, l.c.: 0.001mm., (3) 100-150 mm, l.c.: 0.001mm., one set consist o f three items. make: mitutoyo or insize or iti or mahr or starrett or bowers only. [ warranty period: 30 months after th e date of delivery ] ]