This is a pretty easy filter on the site. When I want to select an alloy wheel for my car I would start by shortlisting the finish in which I want to buy my alloy wheel. So this may be in chrome or matt or black matt with red lip. This option enable you to shortlist the wheels for your car with keeping a particulare colour or finish in mind. This is one of the major parameters people use to select the alloy wheel for their alloy wheels.