These unique stretchable closures are used to re-seal 15.2mm diameter blood tubes after the original stopper is removed. The tubes are made from a homopolymer polypropylene and are Natural in colour. Vacu-Re-Caps are also suitable for sealing other types of glass or plastic tube. They are rimmed to prevent accidentally pushing the cap too far into the tube and they have an easy to grip lip to allow for easy removal. The Vacu-Re-Caps are supplied non-sterile in bags of 1000. Other colours are also available including green, purple or red. Vacu-Re-Caps are also available in a wide variety of colours for 12mm tubes.