This is a pool vacuum nozzle with a 40mm hose connector and it fits a standard pool bar. It is designed to allow cleaning of the bottom of a small pool.

I printed it with PLA, but for longer durability ABS is recommended.

Tip: Try out GCode Simulator to check your print upfront On Thingiverse: http://www.thingiverse.com/thing:44286 GCodePrintr - 3D printing from an Android device Homepage: http://gcodeprintr.dietzm.de