3/8", Brass, Slip-Lok Tee, Use To Connect Outdoor Mist Cooling System Lines & Assembles In Seconds With A Simple Insert & Twist Motion, Can Be Used With Both Low & High Pressure, Up To 160 PSI, Systems As The Tee Actually Grips Tighter When The Pressure Increases, Additionally, The Tee & Tubing Can Be Disassembled By Simply Compressing The Ferrule Against The Body & Pulling Away From The Tubing.