| APERTURE DIAMETER | 18.250 INCHES NOMINAL18.250 INCHES NOMINAL |
| CROSS-SECTIONAL SHAPE STYLE | METAL WINDING W/ SOFT FILLER AND INNER RINGMETAL WINDING W/ SOFT FILLER AND INNER RING |
| CROSS-SECTIONAL THICKNESS | 0.175 INCHES NOMINAL0.175 INCHES NOMINAL |
| GAGE RING OUTSIDE DIAMETER | 27.750 INCHES NOMINAL27.750 INCHES NOMINAL |
| OUTSIDE DIAMETER | 20.750 INCHES NOMINAL20.750 INCHES NOMINAL |
| MATERIAL | GRAPHITE AND STEEL OVERALL |