Pipe caliper measures pipe sizes up to 16 inches and low-end fractional diameters from 1/16 inch. Tool includes a reference fraction/decimal chart and a nominal size pipe table. Only semi-circle exposure or less is required to indicate diameters. When the swing arm is at the 180-degree position, there is a 14-inch ruler.
Oregon Rule Co., Box 5072, Oregon City, OR 97045, FAX (503) 655-8040.