BIG D EXTRA DUTY URINAL SCREENS WITH NON-PARA BLOCK clean and deodorize with every flush while protecting the drain from debris. Blocks are acid-free and water-soluble. Lasts up to 30 days.
- Flexible screen traps debris.
- Enzyme block cleans and deodorizes during flush.
- Screen and block combo fights uric acid odors.
- Lasts up to 30 days.