Features: New and high quality brass adapter for air conditioner copper pipes, offering excellent flexibility, long lifespan, high heat transfer efficiency, and easy welding. Designed for refrigeration, plumbing hardware, and HVAC systems, this brass joint allows seamless welding with copper pipes, ensuring reliable performance in various applications. This brass adapter with fine threads is durable and wear resistant, providing a secure and leak-proof connection for air conditioning, heating, and cooling equipment. Perfect for home renovation projects, widely used to connect pipes or pipelines, especially in air conditioning, refrigeration, and HVAC systems. Its excellent durability, high heat transfer efficiency, and easy welding make it a reliable choice for both professionals and DIY enthusiasts. Specifications: Material: Brass Type: 1/4", 3/8", 1/2", 3/4", 5/8" 1/4": Approx. 92x6.35mm / 3.62x0.25inch 3/8": Approx. 95x9.5mm / 3.74x0.37inch 1/2": Approx. 97x14.7mm / 3.81x0.57inch 3/4": Approx. 98x16mm / 3.85x0.63inch 5/8": Approx. 100x19mm / 3.93x0.74inch Note: 1. Please allow 1-2cm errors due to manual measurement; ensure you do not mind before ordering. 2. Due to differences between monitors, the picture may not reflect the actual color of the item. Package includes: 4pcs Brass Pipe Fitting