Shrink Seals are colorless transparent cellulose bands for sealing Petri dishes and test tubes. They make an invaluable addition to any microbiology laboratory. This product is fantastic when preparing in-house plates that are not used quickly. Ideal when dealing with sensitivity plates for TB and fungus cultures that require prolonged incubation. Easy to apply. The size of the standard band is 92mm x 25mm. Available in containers of 400 seals. Stacking Blocks allow for multiple plates to dry when you have limited bench space.