Package:2pcs Aquarium Oil Skimmer Acrylic Oil Removal Fish Tank Remove Oil Slick Material:acrylic Size:Approx 14cm in total length,17mm in outer diameter,4cm in top wide Color:clear Made of premium material,durable,strong and can be used for a long time.Mini sized,light-weight,easy to install,operate and store. Can be used to remove the oil film on the water surface.The inlet of the cyclone separator is more conducive to removing the oil film.Well for breeding small fish, it never meets the life of fish. Effectively remove toxic substances and wastes,maintaining clean water and keeping your fish safe,to increase the solubility of oxygen.