Cal-June Giant Marine FenderNot an inflatable but a 98% closed-cell inner foam core that will never blow-out or sink - even bullet holes will not materially affect its function! Encased in an outer covering of "Elastomic Skin" (up to 5/16" thick material, some reinforced with nylon mesh) plus a urethane skin base, the Jim Buoy Giant Marine Fenders are extremely resilient and able to flex with the rigors of high energy berthing over and over again, providing the user with extended service under all conditions.Features: Color: Black; Size: 18" X 50"; Thru-Hole Size & Material: 1" PVC; All Models may be mounted vertically or float horizontally.;