The Supco Bullet Piercing Valve for Copper Pipe Tubing BPV31 is a durable metal valve designed for use with 1/4", 5/16", and 3/8" copper tubes. It is compatible with various HVAC systems such as packaged rooftop air conditioners, ducted evaporative coolers, central air conditioners, and ductless mini-split systems with heat pumps. The valve features a silver color and comes with a 1-month manufacturer warranty. The BPV31 model offers reliable performance and is a single unit that weighs 1 lb, making it a convenient and efficient solution for HVAC installations and repairs.