Please determine the actual diameter of the flat round skin that you need. We will attempt to choose skins for you based on the following parameters: Thickness (thin, medium or thick), Spine in the center, or Color combinations. We offer one free parameter; thereafter, each further parameter is $3.20 per skin. We do our best to eliminate skins that have possible defects; however, our prices are based on an “AS IS” basis. This means, on average, you can expect to loseone out of ten skins. Obviously the tightness during installation will alter this ratio, so figure this loss in our cost. The 50+ and 100+ prices are mix and match.