Description: The outflow part of pipe is very well suitable for prevent the accumulation of oil surface film， while it effectively circulates water.Getting Basic， Easy， Simply， Professional， Crystal， Cool， Good Looking!It is made of very high quality crystal glass and a great technology of handicraft， therefore each of item might have a little difference， but it still perfect!It is suitable for a lot of Medium to Large size of tank.High Quality Hand-made Glass.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.Use with canister filter.CHOOSE:No.1 Surface Skimmer 13Mm For 12/16 PipeNo.2 Surface Skimmer 17Mm For 16/22 PipeNo.3 Poppy Pine 13Mm For 12/16 PipeNo.4 Poppy Pine 17Mm For 16/22 PipeNo.5 Skimmer+Poppy Pine 13Mm For 12/16 PipeNo.6 Skimmer+Poppy Pine 17Mm For 16/22 PipePackage Included:1pcs Aquarium Glass Inflow & Outflow Pipe Set