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Pi Tape® brand White Easy to Read O-Ring Inside Diameter tapes are best suited for measuring diameters in low-light environments. They are not intended for use with chemicals or in corrosive environments. These tapes feature dark lines and numerals on a white background.

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).

Please click here to view our ISO/IEC 17025:2017 Certificate of Accreditation (pdf). Not all items we calibrate are included in our scope, however the calibration techniques and procedures are all in compliance with ISO/IEC 17025:2017.

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

 O-Ring Inside Diameter Price List


O-Ring Inside Diameter Tapes White Easy to Read Metric Purchase Options


**The standard width for these tapes is 6.35mm gage member X 12.7mm vernier section.


Part # Size Gage Width Thickness Vernier Section Width Price Link
** RTM03WEZ ** 50 - 300mm I.D. 6.35mm 0.13mm 12.7mm 217.00 Go to Product Page
** RTM1WEZ ** 100 - 300mm I.D. 6.35mm 0.13mm 12.7mm 214.00 Go to Product Page
** RTM1SPWEZ ** 50 - 600mm I.D. 6.35mm 0.13mm 12.7mm 367.00 Go to Product Page
RTM2WEZ 300 - 600mm I.D. 9.53mm 0.25mm 19.05mm 236.00 Go to Product Page
RTM2SPWEZ 300 - 900mm I.D. 9.53mm 0.25mm 19.05mm 386.00 Go to Product Page
RTM3WEZ 600 - 900mm I.D. 9.53mm 0.25mm 19.05mm 249.00 Go to Product Page
RTM3SPWEZ 600 - 1200mm I.D. 9.53mm 0.25mm 19.05mm 400.00 Go to Product Page
RTM4WEZ 900 - 1200mm I.D. 9.53mm 0.25mm 19.05mm 282.00 Go to Product Page
RTM5WEZ 1200 - 1500mm I.D. 9.53mm 0.25mm 19.05mm 289.00 Go to Product Page
RTM6WEZ 1500 - 1800mm I.D. 9.53mm 0.25mm 19.05mm 304.00 Go to Product Page