The Dock Edge Dolphin Roto-Molded Boat Fender is manufactured from the best quality marine-grade vinyl resulting in superior strength, cushioning, and a high-gloss finish. The Dolphin Fender has been tested for many years in various marine environments worldwide. It resists deterioration from mildew, gas, oil, seawater, and bacteria and has built-in ultraviolet inhibitors. The fender includes an inflation valve to allow for adjustment for the desired level of firmness. SpecsSize: 5.5" x 20"Fender Style: Twin EyeColor: Royal Blue Resists deterioration from mildew, gas, oil, seawater, & bacteria Built-in ultraviolet inhibitors Inflation valve allows for adjustment for the desired level of firmness | Dock Edge 5.5" x 20" Twin-Eye Smooth Boat Fender, Royal Blue