The model No. 95 Pushbutton Manual Vent provides the easiest way to manually vent a radiator. You don't need a key, coin, or screwdriver. 1/8" I.P. Male connection, 1-5/8" x 9/16". Manually vent by the push of a button, up to 50 lb (pound) pressure. For vertical or horizontal mounting on convectors, baseboard, and freestanding radiators. Great for tight spaces where vents requiring a key or coin are not practical.