Premier Series #50 hollow pin stainless steel roller chain is constructed entirely of a premium 304- grade stainless steel. This stainless steel roller chain is commonly stock in 10ft boxes including one connecting link per box. Larger reels or specific lengths are available upon request. Some of the benefits of using 304-grade stainless steel is that it is highly resistant to corrosion, chemicals, and harsh environments. This is a high performance precision product. Don_t hesitate to give us a call if you have any questions or need any additional information.