Global O-ring Stock Color Chart
| Color | Most Common Compounds |
| Black | Nitrile (Buna-N, NBR), Viton (FKM), EPDM, Neoprene (Chloroprene), HNBR |
| Brown | Viton (FKM) |
| White | Nitrile (Buna-N, NBR), any FDA compound |
| Green | HSN/HNBR, Viton |
Global O-ring Stock Color Chart
| Color | Most Common Compounds |
| Black | Nitrile (Buna-N, NBR), Viton (FKM), EPDM, Neoprene (Chloroprene), HNBR |
| Brown | Viton (FKM) |
| White | Nitrile (Buna-N, NBR), any FDA compound |
| Green | HSN/HNBR, Viton |
