The inner surface of the wheel is in the form of a bowl installed on an axle. Diameter - about 90 cm, weight up to forty pounds.
The wheel is usually made of special wood. The inner circle is divided into "pockets", depressions in which the ball falls after rotation.
The wheel is a precisely balanced mechanism that has to ensure randomness of the results.
There are two varieties for the roulette wheel - for the American and European games. In the American version - 38 rooms (from 1 to 36, 0 and 00 - ZERO and DOUBLE ZERO), while on the wheel in European variant - 37 numbers (0, 1 - 36)