One-piece construction for added strength. Used as breathers for mattresses, cushions and plastic slipcovers.
Ventilators are solid brass.
2 sizes are available.
This ventilators are set with our Osborne No. 621 and can be also set using Osborne Hand Press W-1 & Pneumatic Machine W-3 with the ventilator dies.
| Osborne No. | Size | Diameter (in) | Weight ea. (lbs) (oz) |
| V-1 3/4 | 3/4 | 9/16 | 1 |
| V-1 1 | 1 | 3/4 | 1 - 4 |
