O-Ring Gauge Make Work Smart, Telescoping O Ring Sizing Plastic Gauge, Slide Style National Type, for Measuring O Rings Inner Diameter, OD, Thickness Gauge Black: Amazon.com: Industrial & Scientific
O-Ring Measuring Gauge Make Work Smart Blue OPSG Pro Gage, (1 Item) Telescoping O Ring Slide Standard AS568, Measuring Inch BS1806 Size ID Gauge: Amazon.com: Industrial & Scientific
O-Ring Sizing Gauge - 5JKC0|5JKC0 - Grainger
Measuring Tool — Patlin Inc. Industrial Supplier
O-RING CHART | PRO-RING SIZE C | Hercules | CRC Distribution Inc.