Explodes safely
Erodes the test kit
Corrodes the test kit
Releases poisonous gas
Quick replacement
Low installation cost
Low maintenance cost
Avoid vibration of air transmission
Increase viscosity of crankcase oil
Decrease viscosity of crankcase oil
Increase miscibility of oil with refrigerant
Prevent oil foaming on restarting compressor
500
1000
1500
2000
Cutting pliers
Screw spanner
Ratchet key/wrench
Double end spanner