New old stock part.  Listing is for a single part.  If more than one is pictured it is just to show difference in packaging or condition.  See photos for detail and condition.

Description: Drive Assembly
OEM(s): Delco
Condition: New
Quality: Premium (USA)
Rotation: CW
ID: 0.476in / 12.1mm
Number of Teeth: 9
Gear OD: 1in / 25.4mm
Length: 2.709in / 68.8mm
Number of Splines: 6
Splines Type: Spiral
Drive Type: Roller
Wet Clutch Seal: No
Application: Delco PG200 & PG250 Starters

Substitutes:
J&N 220-12371
Delco 10469173

References:
J&N 220-12371
Arrowhead SDR5001
Delco 10469173, 10498527, D2048
Wilson 61-01-3479