Will not work with U-type Shackles. Prothanes revolutionary polyurethane compound gives these Greaseable Bushing Kits the strength and responsiveness needed for years of trouble free operation...while the grease zerk fittings offer ease of lubrication without disassembly. All kits include the necessary hardware and complete instructions for easy installation. Available in Red only. *Includes 8 bushings, Prothane Super Grease , 4 greaseable bolts, 4 washers and 4 lock nuts.