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Precision Outside/Inside Diameter Tapes

Pi Tapes


PROSCO Inc. is an authorized dealer for Pi Tape®
-- the original precision diameter measuring tape --


The standard Imperial tapes (inches) read to 0.001” diameter with an accuracy of ±0.001” up to 144 inches.

The standard metric tapes (millimeters) read to 0.01mm diameter with an accuracy of ±0.03mm up to 3,600 millimeters.

In addition, we can construct precision measuring tapes with customized lengths and widths to meet your every need.


PROSCO Inc. offers genuine Pi Tape® tapes for very fast and accurate diameter measurement of round products such of rollers, belts, pipes etc.

Each Pi Tape brand precision measuring tape is delivered with a Calibration Report traceable to the National Institute of Standards and Technology and all calibrations are performed in accordance with ANSI/NCSL Z540-1-1994, ISO/IEC 17025, ISO 10012-1, MIL-STD 45662A and 10CFR, part 21.

These precision 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.


Click the PDF icon to see available sizes of tapes


1095 Spring Steel


716 Stainless Steel


Blue Easy to Read


White Easy to Read

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