| CENTER HOLE DIAMETER | 17.873 INCHES MINIMUM AND 18.043 INCHES MAXIMUM |
| CROSS-SECTIONAL HEIGHT | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM |
| HARDNESS RATING | 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-R-25988,CLASS 1,GRADE 70 MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | RUBBER FLUOROSILICONE CLASS FQ |