【High Quality】: The R134A fluoride quick coupler for automotive air conditioning is made of high quality brass with a removable cover for easy maintenance. It has high resistance to abrasion and corrosion and is durable even under extreme conditions. 【Safe Design】: Metal construction for quick connection/disconnection; the shiny cover provides protection against injury and refrigerant leakage. Adjustable red and blue aluminum switch, precise pressure closure and knurled handle ring, removable adapter for longer use time. 【Easy to Distinguish】: This quick coupler is red for high pressure side and blue for low pressure side. The colors are clearly distinguished. You can quickly distinguish the high pressure side from the low pressure side, saving you time and effort and maximizing convenience. 【Perfect Performance】: Very high quality R134a AC quick connect adapter, made of solid brass, good ductility at high temperature, low magnetic permeability, powerful and very durable. This is a