【Professional use】This quick adapter is specially designed for connecting car coolant tanks and is used to connect 1/4 inch hoses to car coolant tanks R134a. 【Easy to distinguish】The red colour of this quick adapter represents the high pressure side and the blue colour represents the low pressure side. The colour is clear and readable. You can quickly distinguish between the high pressure side and the low pressure side, saving you more time and energy and maximising comfort. 【Safe and reliable】This fast adapter plug enters the system safely and reliably under operating pressure. It uses an easily identifiable, color-coded high-low clutch kit and fixes the confusion caused by too many color coding. 【Material Quality】This quick adapter is made of a variety of brass metal structures, is durable and corrosion resistant and can be used for a long time. 【Service】We are very professional sellers. If you have any questions during use, please send us an email. We will do our best to help you solve the problem., Weight: 0.330693393 pounds, Manufacturer: Madezz