| ENVIRONMENTAL PROTECTION | FIRE RESISTANTFIRE RESISTANT |
| FABRICATION METHOD | CELLULAR, EXPLODEDCELLULAR, EXPLODED |
| LENGTH | 48.000 INCHES NOMINAL48.000 INCHES NOMINAL |
| MATERIAL | RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR |
| NONDEFINITIVE SPEC/STD DATA | II TYPE AND II TYPE AND 1 CLASS AND 1 CLASS AND SOFT CONDITIONSOFT CONDITION |
| WIDTH | 24.000 INCHES NOMINAL24.000 INCHES NOMINAL |
| SURFACE CONDITION | POROUS BOTH SIDESPOROUS BOTH SIDES |
| THICKNESS | 4.500 INCHES NOMINAL4.500 INCHES NOMINAL |