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O-Ring ID Sizing Peg Tray
A 150 x 72 mm lipped bench tray with ten chamfered sizing pegs from 5 to 22 mm diameter. The front row is 5, 6, 8, 10 and 12 mm, left to right, and the back row is 14, 16, 18, 20 and 22 mm. Tip a mixed bag of unlabeled O-rings, grommets or seals into the tray. Slide each ring down the largest peg it fits snugly and stack it there, so every stack is sorted by inside diameter and you can find the size without a caliper.
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