1、High Performance: 4 in 1 tire deflation valve, allows you to deflate four tires at a time, providing an effective way to obtain the ideal tire pressure level. 2、Easy Installation: This copper tire deflation valve is simple to operate, just screw the deflation device to the tire valve stem. Then it will depress the tire valve core and begin to deflate. No abrasion of the valve core and no risking losing it. 3、Features: Tire deflator kit with 4 small deflation devices, each screwed on and off to form a unit, lightweight and portable, and it equipped with a key chain. 4、Function: This tire deflator can extend the service life of tires and save fuel costs, which is practical to use. A good replacement, direct replace for the old or broken one. 5、Quality Material: Tire deflation valve made of high quality copper material, anti rust and durable. Built to meet standard specification, strictly follow factory quality control.