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). 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

 Custom Made O-Ring Inside Diameter Price List


O-Ring Inside Diameter Tapes Blue Easy to Read Inch Purchase Options


**The standard width for these tapes is 1/4" gage member X 1/2" vernier section.


Part # Size Gage Width Thickness Vernier Section Width Price Link
** RT1EZ ** 2" - 12" I.D. 0.25" .005" 0.5" 226.00 Go to Product Page
** RT1SPEZ ** 2" - 24" I.D. 0.25" .005" 0.5" 381.00 Go to Product Page
RT2EZ 12" - 24" I.D. 0.375" .010" 0.750" 250.00 Go to Product Page
RT2SPEZ 12" - 36" I.D. 0.375" .010" 0.750" 391.00 Go to Product Page
RT3EZ 24" - 36" I.D. 0.375" .010" 0.750" 259.00 Go to Product Page
RT3SPEZ 24" - 48" I.D. 0.375" .010" 0.750" 408.00 Go to Product Page
RT4EZ 36" - 48" I.D. 0.375" .010" 0.750" 285.00 Go to Product Page
RT5EZ 48" - 60" I.D. 0.375" .010" 0.750" 301.00 Go to Product Page
RT6EZ 60" - 72" I.D. 0.375" .010" 0.750" 315.00 Go to Product Page