(30") Aquarium Flexible Bubble Wand/ Fish Tank Air Curtain Wall Decoration The flexible bubble wand creates a beautiful decorative of bubble curtain Convenient, flexible wands bend to fit any space  behind rocks, around decorations, etc Help improving circulation and oxygenation, Weighted design ensures "stay-put" placement - wand won't float to surface. No unsightly suction cups necessary. Fits to standard aquarium air line tubing of 3/16" Dimension: Length: 30", Diameter: 0.4"