The lily pipe outflow are made of high quality borosilicate glass. It is durable, safe, non-toxic and easy to clean. Glass transparency gives superb appearance to your aquarium. It makes an elegant curve line in your aquarium. 17mm outer diameter fit the canister filter tubing of 5/8" (16/22mm). Compatible with Eheim, Tetra and other filters. The lily poppy pipe outflow can deliver clean water from the filter with appropriate water flow speed. The smooth poppy shape helps water flow smoothly.

Sizing:Measures 7"L x 7"H，water inlet 0.6",Outlet 1.75"