JARDLI 13mm Plant Aquarium Glass Lily Pipe Inflow and Lily Pipe Outflow for 12/16mm Tube Make an elegant curve line in the box-shaped aquarium. Glass transparency give superb appearance to your aquarium. 13mm diameter fit for the hose of 12/16mm. Deliver clean water from the filter with appropriate water flow speed. Package Included: 1x Lily pipe inflow and outflow, 4x Suction cups.