Speed of about 20,000 rpm / min. Turbine wheel made of brass and aluminum. L rotor made of brass, the diameter is 41 mm.Arrangement has two stainless steel bearings. Intake flange structure, the middle of the O-ring seal. It uses four stainless steel hex screws. The item "New Steam Turbine Engine Junior deceleration group JT-A" is in sale since Friday, April 29, 2016. This item is in the category "Toys, Hobbies\Powered Toys\Steam Powered". The seller is "jinsteam" and is located in GZ,GD. This item can be shipped worldwide.