Crosby® McKissick 6" Tailboard w/ Bronze Bushings: 5/8"-3/4" wireCrosby McKissick 6" Tailboard Block 5 8" to 3 4" Wire Rope This 6" Crosby McKissick Tailboard Block delivers reliable, high load performance for fixed rigging setups. Built to work with 5 8" to 3 4" wire rope, it features a 6" sheave and bronze bushings that ensure smooth, consistent movement under tension. With an 8 ton working load limit and a 4: 1 safety factor, this block is designed to handle demanding lifting and load redirection applications.