| CROSS-SECTIONAL SHAPE STYLE | SQUARE/RECTANGULAR BOTTOM RING |
| CROSS-SECTIONAL SHAPE STYLE | SQUARE/RECTANGULAR TOP RING |
| HEIGHT | 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM |
| INSIDE DIAMETER | 0.370 INCHES MINIMUM AND 0.390 INCHES MAXIMUM |
| MATERIAL | PLASTIC AND ASBESTOS BOTTOM RING |
| MATERIAL | PLASTIC AND ASBESTOS INTERMEDIATE RING |
| MATERIAL | PLASTIC AND ASBESTOS TOP RING |
| OUTSIDE DIAMETER | 0.573 INCHES MINIMUM AND 0.593 INCHES MAXIMUM |