The Mastercool 91390 is a Thread Repair Tool that recuts stripped R12 service port threads. This all-in-one design works for 1/8″, 3/16″ and 1/4″ service ports. It is an excellent retrofit tool that will ensure that the R134a retrofit adapters will fit securely.
Product Features:
- R12 Thread Repair Kit for:
- 1/8″ service ports
- 3/16″ service ports
- 1/4″ service ports

