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重量 0.85331 lbs
Shipping Dimensions 4 × 4 × 2.5 in



OST-COMBO Includes All 3 O-Sizer Tapes:

  • OST-10: I.D. ranges from 2 ½” – 10″ (64 – 264mm)
  • OST-19: I.D. ranges from 2 ½” – 19″ (64 – 484mm)
  • OST-26: I.D. ranges from 2 ½” – 26″ (64 – 665mm)


The World’s BEST O-Ring I.D. Measuring Tape

The O-SIZER® o-ring measuring tape measures Metric and AS568 Series O-Rings.

Available in 3 sizes, the O-SIZER® will measure up to the largest standard AS568 O-Ring Size (-475)

Measures the I.D. of any “O” shaped object, beginning with 2-1/2″ (64mm) all the way up to 26″ (665mm)

Side one of tape indicates the standard AS568 O-Ring Dash Number

Side two indicates the Inside Diameter in millimeters of the O-Ring (or other O-shaped object)

Built-in handy O-Ring Cross-Section Size Guide

O-SIZER® TAPES available in 3 convenient I.D. ranges:

Packaged in strong reusable storage tubes with dust caps

Color of package label corresponds to tape color

Made in the USA of quality plastic materials.