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Twelve different small bubbler buds are connected by 2mm sprues that can be cut with a sharp pair of wire cutters or snippers to separate them. Each bubbler bud is slightly different having large or small holes with the number of holes ranging between zero holes and 17 holes. Two additional bubblers with 4 holes are included having extension tubes through which the bubbles must pass through before exiting the bubbler. Meant for applications where just a small amount of aeration or smaller decorative bubble streams are desired.
The safety of using 3D printed materials in aquariums with living creatures is debatable, so if you have doubts plan on using 3D printed parts in a decorative aquarium containing only plants, snails, and other robust creatures. This product is recommended for purchase using the regular white nylon plastic material since the coloring process might clog the holes.