This is model of Pelton Turbin, a hydro turbine type model for 3D printed part. The Outer Diameter is 160 mm and shaft diameter 20mm. For bearings you can use 2 pcs bearings type 6204 ZZ. Pulley is included if you want to connect with v-belt transmission to an alternator. The bracket support also included so you can use the turbine for generator or you can put it on your table for unique ornament to amaze your friends.