| CYLINDER STYLE DESIGNATOR | CYLINDRICAL TYPE |
| MAXIMUM OPERATING PRESSURE | 4350.0 POUNDS PER SQUARE INCH |
| CAPACITY RATING | 57.000 CUBIC FEET NOMINAL |
| CROSS SECTION OUTSIDE DIAMETER | 6.180 INCHES NOMINAL |
| OVERALL HEIGHT | 18.600 INCHES NOMINAL |
| SPECIAL FEATURES | HSE CARBON/GLASS FULL WRAP CYLINDER; 366 CU. IN. MIN. VOLUME |
| TYPE/MODEL DESIGNATION | ALT 689 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SELF CONTAINED BREATHING APPARATUS |