Features: brand new and high quality 2 Sizes for Choose - 12mm diameter for 12/16mm (1/2inch) canister filter tubing water tube, 16mm diameter for 16/22mm (5/8inch) canister filter tubing water tube. Easy to Install - The stainless steel inflow outflow pipe kit can be installed on the aquarium for tank without using suction cups.Easy to clean, convenient assembly. Metal Lily Pipe - The metal pipes give superb appearance to your aquarium. Make an elegant curve line in your aquarium. Package Includes - 1x stainless steel inflow, 1x stainless steel lily pipe outflow. Stainless Steel Inflow and Outflow Pipe Set - The inflow and outflow pipes suitable for all type of external canister filter. Made of harmless and sturdy 304 stainless steel, against rust and corrosion (Notes: Pipes should be cleaned before used in your aquarium for tank). Specifications: Material: Stainless Steel Color: Silver Diameter (Approx.): S-12mm/0.47in L-16mm/0.63in Weight (Approx.): S-950g L-1000g Package Includes: 1x Stainless Steel Inflow 1x Stainless Steel Lily Pipe Outflow note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!