Stainless Steel;California Residents: WARNING Sold as a pair. Why buy Kentrol Stainless Steel? Because it's the best! Not all Stainless Steel products are created equal. Kentrol products are constructed of virgin metal, 304 Surgical, Stainless Steel. This stuff just won't rust! It's easy to care for too - an occasional waxing will keep the mirror-like shine looking brand new. And to top it off - all Kentrol products come complete with Stainless Steel hardware.