Features: brand new and high quality Glass transparency give superb appearance to your aquarium. Acrylic surface separator, fine crafted, will not harm fish and shrimps. Surface skimmer effectively absorbs the dissolved organic matter and other wastes, removes surface scums. More easily help photosynthesis of water plants. 360-degree inflow design allows water flows get through from all directions without clogging and provides convenience in cleaning. 13mm inner diameter fits for 60-90cm/23.62"-35.43" fish for tank, 17mm fits for 100-120cm/39.37"-47.24" fish for tank. for Eheim, Tetra and other filters. Package includes 1 piece glass lily pipe surface skimmer inflow, 2 pieces suction cups. Specifications: Material: Glass Color: Transparent Size: S/for M S-Approx.Pipe Diameter Approx.1.3cm/0.51in, Height Approx.28cm/11.02in M-Approx.Pipe Diameter Approx.1.7cm/0.66in, Height Approx.29cm/11.42in Weight: Approx.450g Package Includes: 1 x Lily Pipe Inflow with Skimmer 2 x 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!