Fragrance bead technology enhances overall gel performance and longevity for 30 days. As the gel evaporates revealing the beads (the main source of the air freshener), they release a burst of air freshening power helping to extend the gel to 30 days. Environmentally safe: water soluble, non-toxic, non-flammable, water-based formulation. Fits at least twelve different major competitor's cabinets.