14/20 Joint; 19/22 Joint; 24/40 Joint Supplied with a compression cap and o-ring With a serrated hose connection for vacuum or for the introduction of gases, fitting with thermometer or tubing Borosilicate Glass, Heavy Duty Design, Reusable and High quality StonyLab ensures high quality products and premium customer service; If received damaged, please contact us immediately; We will solve it until satisfied