General 142 Fiberglass Dial CaliperHighlights: This inch reading caliper has a fiberglass reinforced plastic body which allows for accurate reading of inside, outside, depth and step measurements. The easy to read dial is color coded to highlight graduations in both . 01" and 1 64", and features a no glare lens cover. In addition, the Plastic Dial Caliper is marked with inch and millimeter graduations on the bar scale and a fractional conversion table on the reverse side.