A Series Buoy A-4 - 20.5 Diameter - Grey - Boat Size 50' - 60'The A-Series is the product that launched the Polyform story. This all-purpose product, with the signature blue ropehold has proven itself in the most adverse conditions. Marking gear used in heavy seas is no easy task. That's why more fishermen use Polyform A-Series than all other buoys combined. You name it, ocean, sea, or river, and the A-Series has been there. Put your trust in Polyform's most versatile and well-known product.Features:Even wall thickness for maximum thicknessHeavy duty reinforced ropeholdsPolyform's unique vinyl valve systemRedesigned ropehold for A-1 through A-7 for improved strength and durabilityDual valve inflation/deflation system for sizes A-5, A-6 & A-7Excellent rafting fender choiceOffered in seven brilliant high-visibility colorsSize: 20.5 x 27Eye Diameter: 1.0 inCircumference: 64.4 inBuoyancy Ratings: 187 lbs