Traxion Step treads are constructed of a durable molded engineered polypropylene design that consists of open slates and aggressive non-slip texture along with a series of structural ribs and gussets for added strength and durability. Traxion is the first and only all-weather, barefoot-friendly outdoor stair tread. Hardware included. Shipping NOW! Simply select your color and order quantity below. There are 4 treads per box, so order accordingly based on your total number of stairs. Dimensions per tread: 34″ x 9.5″ x 1.5″