The GACZ Spring Vent consists of three parts: case, pin and spring. The case is seated in a mold. A pin on which the spring is pressed is secured inside the case.
This spring ensures that the valve is in the open position by default. The valve is closed by contact of the pin with the rubber compound. Upon contact, the valve is opened and allows residual air to escape from the mold cavity. After removing the tire from the press, the pressure on the pin is released and the valve is opened by the spring force.

GACZ optionally offers a pattern creation on Spring Vent`s head Spiral, Snow flake, Star, Dimple Etc.