Brand new and high quality Inflow and Outflow pipe box set. Glass transparency give superb appearance to your aquarium. Make an elegant curve line in the box-shaped aquarium. Outflow pipe has a special shape to create Spiro effect. Deliver the clean water from the filter with appropriate water flow speed. Size 13mm external diameter Use with canister filter Package Included: 1x Lily pipe inflow and outflow 2x Suction cups for mounting