This product is a set of Co2 threaded drain gun cartridges made of stainless steel. Available in quantities of 5, 10, 15, or 20, these cartridges are designed for use with drain guns to effectively clear blockages in plumbing systems. The threaded design allows for easy refilling and ensures a secure connection for optimal performance. Made of durable stainless steel, these cartridges are a reliable and efficient solution for maintaining your plumbing system.