- Patented manual couplers adjust easily to R134a service ports with varying dimensions.
- All metal construction for extra durability.
- Patented, spring loaded depressor will not damage service valves.
- Can be removed from service ports regardless of knob position without losing refrigerant.
- Meets SAE, UL and EPA requirements for containment of refrigerant.
- Color coded.
- A Quality product from Mastercool, USA.