Essential closures for laboratory containers and glassware, joint caps, seals, septums and stoppers are used to secure vessels, minimise contamination and reduce evaporation during storage, handling and routine laboratory operations. Available in a range of materials and designs, including screw caps, sealing liners, rubber stoppers and ground glass stoppers, they are compatible with bottles, flasks and other laboratory vessels. Designed for chemical resistance and reliable fit, joint caps, seals, septums and stoppers support safe sample handling across research, industrial, quality and teaching laboratories.