KOHLER 4929-NA Waterless Urinal Maintenance Balls (Pack of 24) N/A Made in US Case includes 24 urinal balls Balls are individually packaged in recycled materials that allow for easy maintenance To be added to routine waterless urinal maintenance schedule; follow manufacturers waterless urinal maintenance schedule Lightly scented to enhance restroom experience Waterless urinal maintenance ball is designed to change color after approximately two weeks of use; this will provide a visual indicator it is time to maintain the waterless urinal to allow for optimal performance