Precision Outside Circumference Tapes by Pi Tape Texas, LLC, Our Precision Outside Circumference Tapes are available in the Blue Easy to Read material.
Special Pi Tape® easy read, stainless steel ,internal diameter, narrow/wider width, special thickness, go/nogo inspection, extra capacity, intermediate range ,Precision Vernier Periphery Tapes for Direct Diameter Readings - Newman Tools
Economy Extended Range Pi Tapes , O.D. Measuring Tapes – NEWMAN TOOLS SHOPPING CART
PI TAPE 2" to 12" Range Periphery Tape Measure - - Amazon.com