• Used for transferring liquids or gases under vacuum; often works with flasks, vacuum pumps and vacuum rubber tubes for vacuum experiments
• 14/20 inner standard taper joint;19/22 inner standard taper joint;24/40 inner standard taper joint
• Premium PTFE stopcocks
• Borosilicate glass, heavy duty and reusable
• Warranty: StonyLab 1-year limited warranty; if received damaged, please contact us immediately; we will solve it until satisfied