Mastercool 90375 Oil and Dye Injector – 2 oz Heavy-Duty Canister – Compatible with 1/4” Flare A/C Systems – Needle Valve Control – R12 and Retrofit Applications

Mastercool 90375 Standard Oil and Dye Injector for R12 Systems The Mastercool 90375 is a professional-grade oil and dye injector designed specifically for R12 automotive A/C systems. Built with a heavy-duty 2 oz metal canister and a precise needle-style valve, this tool makes it easy to inject refrigerant oil or UV dye accurately and safely. Whether you're servicing a classic vehicle or a legacy HVAC system, the 90375 provides flexible operation. Use system vacuum to draw oil in after evacuation, or inject fluid using refrigerant pressure during system recharge. The needle-style control valve ensures smooth, consistent flow. Equipped with 1/4” FFL x 1/4” MFL flare fittings, the 90375 is compatible with standard R12 service hoses and tools. This is a reliable solution for technicians working on older systems — backed by Mastercool’s U.S.-based support team.

• ✔️ COMPATIBLE WITH 1/4” FLARE A/C SYSTEMS – Designed to deliver oil or high volumes of UV dye into systems using standard 1/4” flare fittings, including R12 and retrofit applications.
• ✔️ 2 oz Durable Metal Canister – Rugged all-metal construction for long-term reliability in both shop and field service conditions.
• ✔️ 2 oz Durable Metal Canister – Rugged all-metal construction for long-term reliability in both shop and field service conditions.
• ✔️ DUAL INJECTION METHODS – Supports both vacuum suction after evacuation or pressurized injection during system recharge.
• ✔️ INCLUDES 1/4” FFL x 1/4” MFL FLARE FITTINGS – Seamlessly integrates with most older and retrofit service hoses and equipment.
• ✔️ PROFESSIONAL-GRADE PERFORMANCE – Trusted by technicians and backed by Mastercool’s U.S.-based support team.