Features: brand new and high quality Has a loop-shape outflow section. Spin outflow pipe creates a circling flow of water inside its loop section, and slows the speed of water flow. 3 sizes with diferent diameters of 10mm, 13mm, and 17mm. To match with different size of hoses. Directly hang on design, can be installed to the aquarium without suction cups. Easy to remove when it comes to clean your for tank. Package includes 1 piece lily pipe spin outflow. Specifications: Material: Glass Color: Transparent Size: S/for M/L S-Pipe Diameter Approx.1.0cm/0.39in, Total Height Approx.15cm/5.91in, Port Diameter Approx.3cm/1.18in M-Pipe Diameter Approx.1.3cm/0.51in, Total Height Approx.15cm/5.91in, Port Diameter Approx.3cm/1.18in L-Pipe Diameter Approx.1.7cm/0.67in, Total Height Approx.17cm/6.69in, Port Diameter Approx.3.5cm/1.38in Weight: Approx.250g Package Includes: 1 Piece Glass Spin Outflow Lily Pipe for Aquarium 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!