Polyform A Series Poly Balls are the favorite multipurpose bouy among fisherman, commercial and recreational alike. These commercial style bouys can be used as anchor bouys, harpoon balls, or as bumpers. Used by offshore lobstermen to mark their gear these balls are built with strength and durability in mind. They have a large diameter rope hole that is reinforced for storm conditions. Made in the USA by Polyform US LTD. Available from J&B in three sizes: A1, A2, & A3