Precision tape for measuring diameter and circumference (both results are obtained in one measurement) made of stainless steel • diameter measuring range: 300 - 700 mm • circumference measuring range: 940 - 2200 mm • accuracy of measurement 0. 1 mm How to use: Wrap the object to be tested with the tape, put the end of the tape through the slot at the end of the tape then on the edge of the tape read the diameter and circumference measurement result.