Needle point cocks provide micrometer adjustment and are recommended where higher pressures normally exist (Max 80 psi). They are used for air and vacuum and especially well suited as a control for rare and exotic gases. Oxygen service valves are available, but must be special ordered. Body is high quality brass forging with precision machined seat. Bronze stem and needle tip are removable and replaceable. Integral ten serration non-slip hose end. Handle design facilitates finger tip control.Index buttons sold seperatelyCOCKS MUST NOT BE USED ON OXYGEN SERVICE.