The sealed membranes contain a powerful, proprietary blend of natural oils that are safe, effective, and provide long-lasting neutralization without creating ozone or leaving any residue. Typical Membrane life is 270 Hours. Dimensions: 16" H x 8" W x 17" L. Up to 5 VaporSHARK 3X Industrial membranes, available in convenient single packs and 5-packs.