The Whink 390879 Rustguard Toilet Bowl Cleaner Tablets are a convenient and effective solution for removing stains from toilet bowls. These unscented tablets are specifically designed for use in toilets and are made without harsh chemicals such as bleach, caustics, phosphates, or dyes. With a volume of 36.1 cubic inches and a compact size of 1.72 x 3 x 7 inches, these tablets are easy to use and store. Made in the United States, this product is a reliable choice for maintaining a clean and hygienic toilet.