Eco Clip Cucumber Melon 12 Per Box - 6 Boxes Per Case. Freshens the Air for 30 days: Unique patent pending material contains 30x more air freshener than standard rimsticks. Gradually releases air freshener over 30 days. Low VOC (compliant in all 50 States, Europe, North America). 100% recyclable. Will not dissolve in or pollute water. Easy to Use: Fits most standard toilets. Clips on outside of bowl. Shrinks to fit as fragrance evaporates. 12 bowl clips per inner box; 6 inner boxes per master. Cucumber melon fragrance, cool green in color.