Robalon replacement snow blower scraper bars are salt, Age & wear resistant. Robalon lasts 2-4 times longer than painted steel, & 3-4 times longer than stainless steel or injected molded Plastics. They have been factory wear tested for proven long life. No marking on concrete & will not scratch pavers or exposed Aggregate. The rigid construction adds stability to the blower housing & creates uniform contact with the ground for a cleaner surface.