We didn’t take any short cuts in manufacturing our billet aluminum sill plates. They are completely CNC machined out of a solid piece of billet aluminum. We didn’t quickly machine or bend a thin sheet to produce our plates. And with our precision machining, you get a part that fits perfectly every time. Our sill plates are available in a raw machined or highly polished finish as well as a variety of Fusioncoated and anodized colors. Sold in pairs.