Product Dimensions: R410a mini-split adapter with 5/16-inch SAE female x 1/4-inch SAE male connector; R12 brass refrigerant tank adapter with 1/2-inch female x 1/4-inch SAE male connector; R134a brass tank adapter with 1/4-inch SAE female x 1/2-inch female connector. Compatibility: This product is suitable for mini-split air conditioners, HVAC, and refrigeration services running R134a, R12, R22, and R410a. Product Material: This product is specially designed and constructed of brass for a long lifespan and resistance to damage. Easy Installation: Direct replacement without adjustment, ensuring perfect compatibility and high reliability. Product include a total of 3pcs Vacuum Pump Adapter, which can completely meet your daily use needs and replacement., Manufacturer: SG Store