In American Roulette the wheel consist of 38 identical slots, numbered from 0, 00, 1 through 36.
On the standard roulette wheel the numbers are not distributed in increasing series or randomly.
On the contrary, the numbers are ordered to achieve a certain mathematical balance between high and low, red and black and even and odd:
Zero and double zero are both green pockets, while the remaining 36 are split evenly between red and black.
Numbers face the outside of the wheel.