About This

✔️ Designed for R1234yf Systems – Specifically built for quick and accurate oil or dye injection into low side service ports of modern R1234yf A/C systems.
✔️ 2 oz Refillable Capacity – Allows precise control over oil or dye amounts with clear measurement scales in ounces and milliliters.
✔️ Heavy-Duty Anodized Aluminum Body – Built for shop use with rugged black anodized finish and laser-etched dye measurement markings.
✔️ Smooth-Twist Handle Control – Simple and consistent twist-to-inject handle design ensures fast, repeatable operation with minimal effort.
✔️ High-Quality Barrier Hose – Durable blue nylon hose is J2888, EPA, SAE & UL compliant, offering long-lasting safety and flexibility.
✔️ Premium R1234yf Coupler Included – Features extended disconnect sleeve for secure fit and meets SAE J639 and J2888 performance standards.
✔️ Built for Professionals – Ideal for A/C technicians who demand quality, accuracy, and speed in a compact, easy-to-use tool. Supported by Mastercool’s U.S.-based service team.