1/4″ Slip-Lock fittings made in brass are a type of quick-connect fitting that is typically used for connecting nylon tubing or in some cases stainless steel tubing. The “slip-lock” design allows for easy connection and disconnection of the tubing without the need for tools or additional hardware. They are made of brass, which is known for its corrosion resistance and durability. They are easy to install and provide a secure, leak-free connection, which is important in applications where a leak could cause damage or safety hazards. Overall, brass Slip-Lock fittings are a good choice for many applications.