Moser steel spools. Choice which application: 9" Ford 12 Bolt Chevy Car 12 Bolt Chevy Truck 8.8" Ford Dana 60 8.75 Mopar GM 10 Bolt 8.5" Add $595 for complete Axle kit w/studs, bearings, & retainers plates, 28-35 spline, as shown in picture. contact me [phone removed by eBay] Parts manufactured by Moser engineering