Features: brand new and high quality Glass transparency give superb appearance to your aquarium. Lily outflow pipe delivers clean water from the filter to the aquarium with appropriate water flow speed (outflow). Suitable for Aquarium for Tank Planted for Tank. 3 sizes.10mm outer diameter fits the canister filter tubing of 3/8" ID, 13mm/17mm fits the tubing of 1/2" ID. for Eheim, Tetra and other filters. Package includes 1 piece lily pipe outflow, 1(10mm) or 2 (13/17mm) suction cups. Specifications: Material: Glass Color: Transparent Size: S/for M/L S-Pipe Diameter Approx.1.0cm/0.39in, Total Height Approx.13cm/5.12in, Port Diameter Approx.4cm/1.57in M-Pipe Diameter Approx.1.3cm/0.51in, Total Height Approx.18cm/7.1in, Port Diameter Approx.5cm/1.97in L-Pipe Diameter Approx.1.7cm/0.67in, Total Height Approx.18cm/7.1in, Port Diameter Approx.5cm/1.97in Weight: Approx.230g Package Includes: 1 Piece Glass Outflow Pipe for Aquarium with Suction Cups 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!