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Pi Tape® brand Blue Easy to Read O-Ring Inside Diameter tapes are best used for measuring diameters in low-light environments. They are not intended for use with chemicals or in corrosive environments. Tapes are constructed of Blue Easy to Read 1095 Spring Steel. They differ from our standard tapes by featuring a higher contrast facing of white lines and numerals on a dark blue 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).

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

 2022 Precision Inside Diameter O-Ring Tape Price List

 2022 Custom Made Precision Inside Diameter O-Ring Tape Price List


O-Ring Inside Diameter Tapes Blue 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
** RTM03EZ ** 50 - 300mm I.D. 6.35mm 0.13mm 12.7mm 288.00 Go to Product Page
** RTM1EZ ** 100 - 300mm I.D. 6.35mm 0.13mm 12.7mm 282.00 Go to Product Page
** RTM1SPEZ ** 50 - 600mm I.D. 6.35mm 0.13mm 12.7mm 494.00 Go to Product Page
RTM2EZ 300 - 600mm I.D. 9.53mm 0.25mm 19.05mm 311.00 Go to Product Page
RTM2SPEZ 300 - 900mm I.D. 9.53mm 0.25mm 19.05mm 519.00 Go to Product Page
RTM3EZ 600 - 900mm I.D. 9.53mm 0.25mm 19.05mm 329.00 Go to Product Page
RTM3SPEZ 600 - 1200mm I.D. 9.53mm 0.25mm 19.05mm 540.00 Go to Product Page
RTM4EZ 900 - 1200mm I.D. 9.53mm 0.25mm 19.05mm 374.00 Go to Product Page
RTM5EZ 1200 - 1500mm I.D. 9.53mm 0.25mm 19.05mm 387.00 Go to Product Page
RTM6EZ 1500 - 1800mm I.D. 9.53mm 0.25mm 19.05mm 406.00 Go to Product Page