The G Series fender is more than just a utility fender. It has the strength and surprisingly important esthetic appeal of molded-in ribbed construction, inflation valves in larger sizes, and reinforced ropehold areas found in more expensive styles. Combine that with Polyforms traditional blemish-free finish work and you have the G Series in a class by itself. Polyform prides itself on exceptional engineering and quality control to produce the strongest, most reliable buoys and fenders in the world. Their fenders have a reputation for even wall thickness (no thin spots or voids), a reliable valve system and unique structural reinforcements in critical areas. Available in 6 sizes Inflated and individually tested in the factory The four largest sizes (G-3, G-4, G-5, G-6) have inflation valves so firmness can be adjusted Diameters range from 3.5 to 10.5 Lengths from 13 to 30