<p>While many AUTO refrigerant changing kits are designed for AUTO AC, even though some of them claim to support Mini-split and HVAC, it could be dangerous such systems to be used for Mini-split. As R410a refrigerant requires higher pressure than an AUTO AC system, (an AUTO AC refrigerant system designed with low-pressure latency), it could be burst when used for Mini-split system. Kozyvacu Mini Split/HVAC/AUTO AC Repair Complete Tool Kit is designed to be a truly complete tool kit that fits both R134a and R410a systems. All the components have been designed and tested for high burst pressure and boast great durability and high performance. Whether applied to commercial or non-commercial uses, this tool kit can do it all! </p> <p>[Three Colored Hoses] Brass 'Quick Seal' fittings - 45 degree on one end, straight on the other - providing a leak-free seal. Sets of 60 inch long, 1/4 inch yellow, blue, and red hoses; 800 PSI working pressure; 4000 PSI burst pressure, Hose ends feature a strong, six-sided crimp that provides a secure, reliable connection between the hose and barb even at maximum pressure. Red and Blue hoses feature one end ¼” connector to connect with gauge and another end at 5/16” to connect R410a system or convert to fit R134a system. Yellow hose has both ¼” connector to connect gauge and refrigerant can or AC system.</p>