Feature Highlights: 1. Reliable Anti-Backflow Design – This one-way check valve prevents reverse airflow, keeping your air compressor running smoothly and protecting it from pressure issues. 2. Clean Air Delivery – Ideal for sensitive uses like medical or food-related applications, it ensures contamination-free air supply. 3. Direct Drive Efficiency – The direct-drive system boosts performance, making quick inflation tasks easier in any setting. 4. Compact & Portable – Small, lightweight build lets you move or store it effortlessly—perfect for on-the-go jobs or tight spaces. 5. Quiet Operation – Built with noise-reducing features, it runs quietly enough for home, office, or workshop environments. Product Details: Made from durable copper with threaded connectors (male/female options), this check valve ensures a secure fit and works with most pneumatic setups. It’s built to maintain steady air pressure, stop backflow, and support both DIY repairs and professional use. The set includes 6 valves for versatile replacement or multi-point installation. Specifications: - Color: Golden - Material: Copper - Size: 4.00 × 3.80 × 3.50 cm / 1.57 × 1.49 × 1.38 in - Package Contents: 6 × Air Compressor Check Valves