✔️ ORIGINAL MASTERCOOL DESIGN – Built on patented technology originally developed by Mastercool, trusted by professionals for decades. ✔️ UNIVERSAL R134a COVERAGE – Works with standard valve cores (0.210-36), JRA (M6 x 0.75), and Eaton-style cores (8mm & 10mm threads).
Valve Core Installation Tool Mastercool 58490
✔️ ORIGINAL MASTERCOOL DESIGN – Built on patented technology originally developed by Mastercool, trusted by professionals for decades. ✔️ DURABLE, FIELD-READY CONSTRUCTION – Features brass body, stainless steel ball valve, and hardened steel shafts.
