ONA - Block Tropics 170g Ona Block Solid Can be placed in small enclosed spaces and vents, to control odors The ONA Block measures 3" x 3" and will fit in most places Safe for home or business and can be used around people, pets and plants Simply remove the cap, or punch several small holes in the cap and place in desired location. It provides Ona a pleasant natural air. In the kind 'TROPICS Ona a little smell of TROPICAL FLAVORS