FlatFace Teflon bushings were an invention of mine around a year ago, when I realized this soft impressionable material could create a unique bushing. As you may know, the space where a bottom bushing goes between the trucks is not perfectly even, so the bushing may squeeze unevenly and won't tighten very well. However, with these bushings, they are designed with a special material which forms to the shape of your trucks to keep your trucks tight and solid. The top bushing is a regular black rubber compound material and the bottom is the special teflon white bushing. Endorsed by Doug Bodkin, an active user of these bushings for nearly a year.