12" x 2" hub & drum kit with 8 on 6.5" bolt pattern for 5,200-7,000 lb axles. Includes the hub & drum casting plus inner and outer bearings, grease seal, grease cap, and wheel nuts. Designed for a #42 spindle; each hub is rated for 3,500 lbs capacity. Spindle nut and spindle washer sold separately. Cooling fins help keep brakes cool. Made in the USA. Kit includes: 1 25580 inner bearing, 1 14125A outer bearing, 1 25520 inner race (pre-pressed), 1 14276 outer race (pre-pressed), 1 10-36 grease seal, 1 21-43-1 grease cap, 1 85-1 grease cap plug, 8 X1023R wheel nuts, and 1 hub & drum casting. Use with a 12" x 2" brake.