This tubing clamp offers on/off and fine control so accurately that it replaces stopcocks in many applications. It may be put in place without disconnecting tubing or interrupting your operation. Molded of Delrin® plastic, the clamp is autoclavable and resistant to acids, alkalies, and organic solvents. Accepts flexible tubing up to 14 mm (1/2") O.D. 3 per pack.