Eco P Gobbler - Dome WhiteProbiotics Urinal Block prevents uric scale build up. Place in the urinal and leave the product will flush into the urinal. The Probiotics in the product are highly intelligent. They immediately analyze their intended target and quickly secrete the precise type and massive concentrations of digestive enzymes. The target is permanently broken down into essentially carbon dioxide and water. Helps reduce scale build up and the odours caused by them.