Channel cubes, also commonly known as urinal blocks or toss blocks, are small, hard chemical blocks placed in the channels or troughs of commercial men's urinals. They are designed to deodorize the washroom, neutralize uric acid odors, and help maintain urinal hygiene by slowly dissolving with each flush. A 3kg tub is a standard bulk size, providing a long-lasting supply ideal for high-traffic public, industrial, or commercial restrooms.