The exhaust valve is made of nice brass and can be used quickly without complicated steps and processes. It has good exhaust performance and is suitable for most heating systems. Easy Installation: It is quick to use without cumbersome steps and processes. Exhaust: Vertical installation of the vent has good exhaust performance. Product Name: Automatic Air Vent Valve Dimensions: 3.15 inches high and 1.9 inches wide Thread: 1/8 inch Widely Used: suitable for most heating systems, including hot water radiators, small heaters, etc Good Materials: The exhaust valve is made of good brass and has a good service life Easy Installation: It is quick to use without cumbersome steps and processes Exhaust: Vertical installation of the vent has good exhaust performance Compact Size: The product is small and does not take up too much space Colour:As Shown Material:brass Package Contents: 1 x Automatic Air Vent Valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.