Waterway Marine Products offers a wide range of bumper/rubrail products to meet most marine dock needs. Our P style design has a sloped bottom half. This allows boats to glance off bumper instead of tearing it off the dock when they rock up and down. The flexible PVC will not crack, rot, or deteriorate when exposed to extreme temperatures. It is also unaffected by gas, oil, or saltwater and has UV inhibitors to prevent yellowing and deterioration from sunlight. There is even a fungicide that is added. Please feel free to email us for large quantity pricing.