PI Tape Texas, LLC was developed in 1944 by innovation-driven specialists to accurately measuring diameter through circumference. Today, PI Tape® is globally recognized as precision leaders in the aerospace, drilling and industrial marketplaces and used widely by NASA, Lockheed, General Dynamics, Boeing and more. PI Tape® 1095 spring steel options are available from 0.75" all the way to 144" options, and continue to be proudly manufactured in America.