This fiberglass tape refill measures 1/2 x 50 feet. It fits your OTR Series Case. The hook end ensures that it will fit your device well. The Keson RF-10-50 Fiberglass Tape Refill is something you should definitely have in your toolbox.
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Measuring Tape Blade Refill, For Use With Mfr. Model Number OTR Series Case, Fits Brand Keson, Type Fiberglass, 1/2 in x 50 Ft, Hook End,
Keson Fiberglass Tape Refill,50 Ft,Engineers RF-10-50