This is an old house wife remedy. Because of its purity the tablets do not leave a residue, unlike other imitation or generic brands that are either inconsistent in purity or poor quality. These tablets can be used to spiritually purify your Home Camphor Blocks are also another home remedy to make sure your silverware and tools do not tarnish or rust. Because of the purity of these tablets no residue is left keeping it clean and safe. 6 Pack of Product with UPC: 729545020501 Packaging may Vary