Fits: Small and Big Block Chrysler; Pulleys are 6061-T6 aluminum and hard coat anodized and mandrel is black anodized for exceptional strength and extended service life; Extra long to accommodate any combination; 6-bolt self-centering aluminum hub fastens to balancer, steel mandrel mounts to hub and provides rigid pulley mounting; Includes: Steel Mandrel, 4 V-belt pulley for alternator, 2-1/2 V-belt pulley for vacuum pump, 1 (16-tooth) Gilmer pulley for external oil pump, guide plates, assorted spacers, belt guides and hardware