C.S. Osborne No. 621 Ventilator Setter
Ventilator Setter for V1 Ventilators
- For 3/4″ Ventilators Punch Hole using 14mm Osborne Belt punch for vinyl use a 13mm punch. For 1″ Ventilators use a 18mm punch.
- Lay Ventilator neck up on base, place material over ventilator, now slip ventilator ring on bow side up. A few even taps with a mallet will set ventilators.
