Check the listing for details. US Seller Aquarium Filter Pipes Glass Lily Inflow Surface Skimmer Outflow Set. Condition: New. Listed at 32.98 USD. Features: Set Includes skimmer lily Inflow pipe, outflow pipe and spring brush. Made of the highest quality laboratory-grade borosilicate glass. (The floating part and the unit for adjusting the ratio between surface extraction and intake in the lower part are made of highly transparent and durable acrylic) Skimmer lily Inflow pipe will auto adjust with the water level. Surface skimmer effectively remove the dirty film on top of the water. Water surface flow rate can be adjusted by rotating the bottom part. Lily outflow pipe delivers clean water from the filter to the aquarium (outflow).Attention! Ø13mm outer diameter suitable for tubing of 1/2''ID(12mm internal / 16mm external). Ø17mm outer diameter suitable for tubing of 5/8''ID(16mm internal / 22mm external). Package included: 1x lily pipe outflow, 1x lily skimmer Inflow, 4x suction cups