| TABLE OF CONTENTS |
| 1. | Air Gage Principles ... Air Ranges for External Diameters | 1 |
| 2. | Figures | |
| 2.1 | Center-Jet & Shoulder Style Air Ring Gages | 1 |
| 2.2 | Three-Jet Air Ring Gage Measures Three-Lobed Condition | 1 |
| 2.3 | Three-Jet Air Ring Gage | 1 |
| 2.4 | Slot-Jet Air Ring Gage Mounted on Stand | 1 |