ITEM NAME:1/4"-1/4" R22 Refrigeration Charging Adapter Air Conditioning Valv Charging N8D7 Description: 100% Brand New and High quality. Material: Brass Connection Form: Internal Thread and External Thread Pressure environment: atmospheric pressure Working temperature: room temperature Form: Pressing Specification: 1/4 outer filament and 1/4 inner filament Usage: Remove excess air in refrigerant tube by pressing exhaust gas Package include: 1*Refrigerant Exhaust Valve Note: Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Usage: Remove excess air in refrigerant tube by pressing exhaust gas. Connection Form: Internal Thread and External Thread.