1. Safety design to prevent injury and refrigerant loss
2. Easy to install and use, easy to operate
3. Use: applicable to air conditioner fluoridation
4. Material: valve body pure brass, handle aluminum
5. R410: about 12mm
6. R22: about 11mm
7. Length: about 6.5mm
8. Weight: side R410 models about 68g, side R22 models about 61g