haokaini protein skimmer oil filter, aquarium grass cylinder acrylic filter surface,efficient degreasing membrane for fish tank water plant haokaini <b>features:</b><br/>this device needs to connect filter barrel inlet pipe to use.<br/>help effectively filter the protein, oil film and the floating dust.<br/>two types of connector, provide more selection for the daily use.<br/>water flow controllable and adjustable with bottom water inflow regulation system.<br/>exit pipe sponge filtration, protect the fish and shrimp from getting hurt.<br/>made of acrylic, durable and eco-friendly.<br/><br/><b>specification:</b><br/><b>color:</b>transparent<br/><b>material: </b>acrylic<br/><b>total length:</b> 170mm/6.69"<br/><b>floating head length:</b> 105mm/4.13"<br/><b>connector:</b> 12/16mm & 16/22mm<br/><b>application:</b> filter the protein, oil film and the floating dust<br/><br/><b>note:</b><br/>please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.<br/>thank you for your understanding, nice day!<br/><br/><b>package including</b><br/>1 x acrylic protein skimmer