Includes:
34mm (1 5/16") OD headset cups (2 pcs.)
bearings (2 pcs.) 
bottom bearing race (1 pc.)
bottom bearing race plastic ring (1 pc.)
top bearing race (1 pc.)

bearing gasket (1 pc.)

(top cap (1 pc.)

threaded starnut (1 pc.)
starnut screw (1 pc.)
rubber cap for starnut screw (1 pc.)

steering tube spacer (1 pc.) (not included)
steel spacer (1 pc.) (not included)

Applications:
Headset cups bottom sides slip into a frame headtube that has an ID of 34mm +/- 2mm (1 5/16")
Most common headset used with a triple tree chopper forks on a cruiser, chopper, or motorized bicycle