Quickly and easily connect semi-rigid tubing such as PTFE, ETFE, and FEP as well as rigid materials such as glass, PEEK, and stainless steel. Each fitting includes polypropylene (PP) caps, O-rings/seal, and PTFE cones (1.5 mm OD). Use the interchangeable components to create chemically inert fluid pathway connections and flat-bottom ports (using Gripper fittings). Fittings with integral on/off valve helps control the flow of your fluid line. Fittings are autoclavable (remove caps first). Order colored caps quickly and easily color code multiple fluid lines.