All Dolphin roto-molded fenders are manufactured from the best quality marine grade vinyl resulting in superior strength, cushioning and a high gloss finish. Dolphin fenders have been tested for many years in various marine environments worldwide. Dolphin fenders resist deterioration from mildew, gas, oil, seawater and bacteria and have built-in U.V. Stabilizers. All fenders include an inflation valve to allow adjustment for the desired level of firmness. Dolphin’s new Twin Eye Ribbed fenders feature specially reinforced heavy-duty integral lugs for added strength and longer durability. These fenders provide maximum protection and value for your dollar. Come in 4.5″x16″, 5.5″x20″, 6.5″x23″, and 8.5″x27″ along with a choice of color white, royal blue, black, or navy blue.