Use fittings with inverted cones to achieve a simple and easy-to-use low-pressure connection. As the fitting is tightened, the resistance of the cap increases until the correct torque is reached. The ETFE cone is the only part in the fluid path and offers excellent chemical resistance. The cone sits in the recessed area of the fitting allowing maximum thread engagement. None of the parts are permanently attached to the tubing, so both fittings and inverted cones can easily be removed and reused. Select from acetal, polycarbonate (PC), or PEEK™ material of construction. PEEK fittings are compact in design and provide excellent chemical resistance.