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Pi Tape Texas, LLC manufactures Diameter, Circumference, Linear Rules, Go/No-Go tapes, and custom specialty tapes for measuring O-Rings inside diameters of other soft-walled parts. In addition, Pi Tape Texas, LLC can construct precision measuring tapes with customized lengths and widths to meet your every need. 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). Click here to find out more ABOUT OUR STEEL.