Protect your dock and your boat with FlexMaster dock cushioning. Made from a durable yet flexible extruded PVC material in both black and white. Standard profile can be purchased without any backing to be mounted on a 2 x 4 when and where you choose. Our most popular request is FlexMaster with our recycled plastic backing installed on either a 2 x 4 or 4 x 4 board. We use stainless steel fasteners along the full length and complete the assembly with a finishing top cap.