Mastercool 81490 R134a Valve Core Remover & Installer – Service Valve Cores Under Pressure – Compact Tool for Automotive A/C Systems with Internal Shutoff

✔️ REPLACE R134A VALVE CORES WITHOUT EVACUATING THE SYSTEM – Built-in shutoff valve allows technicians to remove and replace valve cores while the system remains fully pressurized.

✔️ WORKS WITH MOST STANDARD R134A VALVE CORES – Designed for vehicles that use 13mm (low side) and 16mm (high side) service ports with conventional R134a cores.

✔️ IMPORTANT FITMENT NOTICE – This tool does not fit all R134a vehicles. Some Ford, GM, and Chrysler models use oversized or non-standard valve cores.

✔️ FOR BROADER COMPATIBILITY – See Mastercool kits: 58490 (Standard, GM, JRA, Eaton), 58560 (Eaton-style), or 58531 (Standard + JRA cores).

✔️ COMPACT AND EASY TO USE – Simple one-piece design fits in your pocket or tool pouch, ideal for mobile or in-shop use.

✔️ DURABLE AND FIELD-READY – Features hardened steel shafts, a brass body, and a steel handle with rubber sleeve for comfort and control.

✔️ INCLUDES BOTH HIGH & LOW SIDE CONNECTORS – Comes with 13mm and 16mm service port adapters for quick connection to most R134a systems.

✔️ BUILT BY MASTERCOOL – Backed by over 45 years of experience in professional A/C tools and technician support.