The economy Dock Edge "C" Shaped Co-Extruded Profile is made to exacting standards from marine-grade PVC with UV inhibitors and fungicides. It will not crack or distort with temperature extremes. It comes in easy to install 6' lengths. It can be used on flat surfaces as well as on pilings.• Made from marine-grade PVC• Will not crack or distort with temperature extremes• Use on flat surfaces or pilings• Measures 3-1/2"H x 1-1/4"D• Comes in fifteen 6' pieces Can be used on flat surfaces as well as on pilings Measures 3-1/2""H x 1-1/4""D Comes in fifteen 6' pieces | Dock Edge "C" Guard Dock Profile, 90', White