Specifications:
Bolt pattern: 5 on 4.5 inch
Load capacity: 2000lbs
L44643 Inner/outer bearing: 1in I.D
L44610 Inner/outer race: 1.98in O.D
Grease seal: 1.987in x 1.249in
Grease cap: 1.986in O.D

Package includes:
2 x 5 on 4.5 inch trailer hub
2 x 1 inch BT8 square spindle
4 x Inner/outer bearing L44643
4 x Inner/outer race L44610
2 x Grease seal (1.987in x 1.249in)
2 x Dust cap
2 x Cotter pin
2 x Spindle nut
2 x Spindle Washer
10 x 1/2 inch - 20 nuts (already installed on the hub)

Note.1: Please install the bearings and oil seals onto the trailer hub before installing the spindle, as direct installation may cause jamming.
Note.2: If you insist on directly installing the bearing onto the spindle and it gets stuck, you can use sandpaper to lightly polish it.