[Size] 1/4 inch male air compressor quick plug to a female 3/4 inch garden hose thread (GHT) and 1/4 inch male quick connecting plug and 3/4 inch male GHT thread. This is a standard size compatible with most applications. [Material] This RV winterizing blowout adapter is made of heavy-duty copper, offering durability, high-temperature resistance, strength, and corrosion resistance. It is resistant to breakage and deformation for long-term use. [Application] This blowout adapter is used to winterize garden hoses, sprinkler systems, and faucets by blowing water out of water lines and plumbing to prevent freeze-related damage. It helps reduce antifreeze usage—convenient, safe, and environmentally friendly. [Easy to Use] Screw the adapter onto the water line using the appropriate male or female threading. Connect the quick plug to the air compressor’s female quick coupler. Turn on the air compressor and adjust the ball valve stem to control airflow and blow water from the lines. Product Usage: RV and garden water pipe connection Material: Copper Color: Yellow Package Contents: 1 x RV sprinkler adapter Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.