Merco Marine has ten rub rail and dock edging profiles. We designed our P style rub rail with a sloped bottom half. As boats rock up and down they tend to glance off ours instead of tearing it off the dock. That is just the beginning. Our flexible PVC will not crack, rot or deteriorate when exposed to extreme temperatures. It is unaffected by oil, gas or saltwater and has UV inhibitors to prevent yellowing and deterioration from sunlight. We even add fungicide. Besides all that, you cant beat the price. Plus, you will not find this product anywhere else because we own the molds.