Our Precision Outside Diameter tapes are manufactured to exacting standards in temperature controlled facilities at 68°F (20°C). The lines and numerals on our standard tapes are engraved and acid etched on a ground surface. The tapes have fixed readings that do not require periodic adjustments.

Our standard Imperial tapes (inches) read to .001" diameter with an accuracy of ± .001" up to 144 inches.

Our standard metric tapes (millimeters) read to .01mm diameter with an accuracy of ± .03mm up to 3,600 millimeters.

Each Pi Tape® brand precision measuring tape is furnished with a Calibration Report whose measurement results are traceable through NIST to the international system of units (SI).

Specialty sizes, widths and larger tapes are available upon request.

Pi Tape® - the original precision diameter measuring tape.