High Low Pressure Quick Coupler Set: AC valve core removal tool set with red high pressure coupler with inner diameter 16mm, blue low Pressure coupler with inner diameter 13mm. R1234yf valve core quick remover installer adapter with red high pressure coupler with inner diameter 17mm, blue low Pressure coupler with inner diameter 14mm. Wide Usage: Auto AC repair tool set is suitable for R134A R1234YF R12 automotive air conditioning systems, ideal for auto and household air condition. Great tool to change leaky valve cores without the hassle of purging and recharge entire system. Well Design: Air conditioning valve core remover installer tool designs with valve core buckle and ball valve which can be opened and closed in just a quarter-turn, without loss of refrigerant. With six ball hex head and anti-slip design increase hand friction, prevent all kinds of overpowered valves. High Quality: Valve core quick remover tool is mainly made of brass, stainless steel valve rod, red and blue valve knobs are made of aluminum, low-loss fittings, and allows you to change valve cores without bleeding your system. Easy to Use: Automotive ac r134a r1234yf valve core remover and installer tool make change scharder valves easy, to allow you to replace valve cores on older and newer vehicles. If you need to swap out a valve core this really having to evacuate the system, swap out the valve cores, vacuum the system and refill the system with freon. Color: As Shown Material: Metal Package Contents: 1 set * Valve Core Remover Tool 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.