Quality Seals O-Rings, ORID® O-Ring Identifier Tool, Differentiate between known O-rings.
The height of the FIRST bounce indicates the O-ring: Highest Graduation — EP ethylene propylene O-rings are compatible with most water based chemicals from 70 º F to +300 º F. Third Graduation — NITRILE. Also know as Buna-N. These O-rings are good for ......