| APERTURE DIAMETER | 7.422 INCHES MINIMUM AND 7.453 INCHES MAXIMUM |
| CROSS-SECTIONAL THICKNESS | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM |
| CROSS-SECTIONAL SHAPE STYLE | METAL WINDING W/ SOFT FILLER |
| OUTSIDE DIAMETER | 8.688 INCHES MINIMUM AND 8.750 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A167 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | ASBESTOS AND STEEL OVERALL |
| MAXIMUM PRESSURE RATING | 600.0 POUNDS PER SQUARE INCH |
| NONDEFINITIVE SPEC/STD DATA | 300 SERIES AND 400 SERIES AND 600 SERIES |
| STYLE DESIGNATOR | CIRCULAR |
| TEMP RATING | 850.0 FAHRENHEIT |