4040 Tailboard Block (3/4" wire x 8" sheave)4040 Tailboard Block 8" Sheave for 3 4" Wire Rope Engineered for high capacity rigging jobs, the 4040 Tailboard Block with an 8" sheave is built to accommodate 3 4" wire rope and tackle demanding loads with confidence. It features a 16,000 lb working load limit and 80,000 lb break strength, reinforced by a 5: 1 safety factor for maximum load assurance. A bronze bushing reduces friction and supports long term durability in the field. The open side