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O-Ring Measuring Cone
Unique device for measuring o-rings up to 8" inside diameter. The base of the cone is used to determine the cross section of the o-ring. Then, for o-rings 1/4" to 3" inside diameter, the ring is simply dropped over the cone, and the size is read above the o-ring. For o-rings from 3" to 8" inside diameter, the tape is simply expanded inside the o-ring, and the size is read directly from the tape. All size numbers correspond to industry ARP standard size series.
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