| CENTER HOLE DIAMETER | 9.929 INCHES MINIMUM AND 10.039 INCHES MAXIMUM |
| CROSS-SECTIONAL HEIGHT | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM |
| HARDNESS RATING | 75.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MINIMUM AND 90.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MAXIMUM |
| MATERIAL | RUBBER SYNTHETIC |
| SPECIAL FEATURES | ALL RINGS SHALL COMPLY DIMENSIONALLY WITH THE REQUIREMENTS OF BS 1806 |
| TEMP RATING | -20.0 CELSIUS AND 70.0 CELSIUS |