Barbour Plastics Commercial Bumper F92353 Black. 2-1/8" inches x 2" inches. Uniflex is a revolutionary patented product which combines the best features of our traditional rigid and flexible profiles. The product is dual durometer co-extrusion, meaning two hardnesses of plastic joined in the molten sate, assuring permanent bond. When installed the rail appears to be a typical flexible rubrail but the rigid plastic provides the extra degree of stiffness allowing the rail to install straighter on the gunwale while still retaining flexibility to turn corners. Sold by the Foot.