Alpine Gear Stainless Steel Step Bars are made in America using only American Made raw materials. Alpine Gear is a trade name manufactured by Austin-Harley Inc. in Wolcottville, IN. The mirror finish step bars are polished from 16 gauge 304 Grade Stainless Steel. Our polished stainless steel bars are backed by a 100% lifetime warranty to guarantee these bars against rust. Manufactured at our facility from start to finish to ensure quality workmanship and excellent craftsmanship. The black step bars are manufactured using 16 gauge 409 Stainless Steel then dipped in black electrocoating for solid bond to the metal which is very salt resistant and finished with an Egg Shell powder coating for appearance and UV resistance. This process makes our black nearly Bullet Proof, and why we stand behind it with the industry's best 10 year warranty!