Dock Edge + Inc. Premium PVC Outside Corner Dock Bumper, Pack of 4 Double "D" design is easily installed on any horizontal or vertical surface Protection for bathers against splintering and skin abrasions 5 pcs - 8 Feet per Section, Total Feet=40 Constructed of marine grade flexible PVC developed not to chip or crack under normal usage UV Inhibitors and fungicides prevent fading, yellowing, deterioration from sunlight