One joint size 14/23 but with added safety of screw thread secure joint. This set contains 9 items with 14/23 joint size for maximum versatility. Housed in diecut foam lined box placed in Gratnells® tray and lid. Consists of 1 Flask, pear shaped, 50 ml 1 Still head 1 Liebig condenser 1 Screwcap adapter 1 Receiver adapter 1 Air leak / steam inlet tube 1 Dropping funnel 50 ml with GP rotaflow tap 1 Stopper 1 Thermometer