1/8" thick outer shell
High density polyurethane foam core
Designed to prevent loss of flotation
Jim Buoy's Premium Mark V rock hard shell utilizes one of the toughest plastics available today. The 1/8" thick outer shell is absolutely seamless and virtually indestructible. The 2-lb. high density polyurethane foam core features permanently bonded eye bolts, thus preventing wear and eventual loss of flotation. 396-lb. buoyancy.