A band of PVC plastic that fits around the cap and neck, or sometimes the whole bottle or jar, which must be torn and removed to open the container. Once the band has been removed it is not possible to reapply the used band. Our stock shrink bands are .05 mm thick with a vertical perforation for easy removal. Will fit our 1/2 oz, 1 oz & 2 oz  oz Boston Round with Regular Caps & Droppers.

Will Fit

18-400, 18-410 Caps

20-400, 20-410 caps