The No. 95 Pushbutton Manual Vent® provides the easiest way ever to manually vent a radiator. You don’t need a key, coin or screwdriver. All you have to do is push on the insulated cap of the No. 95 Pushbutton Manual Vent® to release trapped air. Let go and the vent closes automatically. Great for tight spaces where vents requiring a key or coin are not practical.