[User-Friendly Design]: Engineered for simplicity and efficiency, this kit allows straightforward connection to the A/C system's low side for quick oil or dye injection. The easy-to-operate hand-turn mechanism is designed for both professional technicians and DIY enthusiasts alike, facilitating routine maintenance without tools. [Enhanced Compatibility Set]: The kit includes versatile couplers such as the R134A low side quick coupler (1/4inch SAE male x 13mm female), a R1234yf low side coupler (14 mm female x 1/4inch SAE male), and an R410a mini split adapter (5/16inch SAE Female to 1/4inch SAE Male), ensuring a fit for various system requirements and extending its functional use across different refrigerant types. [Multipurpose HVAC/R Maintenance]: Comprehensive AC oil dye injector kit compatible with R134A, R410A, and R1234YF refrigerants, Perfect for multiple applications ranging from automotive to residential and HVAC systems. Equipped to handle oil and dye injection from 1/4 oz/7.5ml up to 2oz/60ml directly into the low-pressure side. [Built for Durability]: Constructed from high-quality aluminum alloy with a hand-turned body and reinforced with robust brass couplers attached to a thickened hose, this kit is designed to offer reliability and in any maintenance environment, ensuring leak-proof and safe connections during use., Weight: 1.59394215426 Pounds, Manufacturer: Tuidzljd