Constructed from solid copper for superior heat resistance and long-lasting durability, perfect for efficient heating systems. Easily remove trapped from your heating system with the manual screw devise, allowing for precise control during the bleeding process. Compatible with both 1/2 inch and 1 inch radiator connections, ensuring versatile application across various heating setups. Restore optimal heat distribution by eliminating pockets in your radiators, enhancing overall heating efficiency without complex mechanisms. An essential maintenance tool for both residential and commercial hydraulic heating systems, featuring a compact devise for easy installation in tight spaces., Manufacturer: OTENG