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: Regulator, Electronic
OEM(s): Mitsubishi
Voltage: 12
Set Point: 14.7
Terminal ID: Relay-Light
Polarity: Negative
Includes Brush Holder?: Yes
Activation: Ignition
Adjustable?: No
Circuit Type: A-Circuit
Includes Rectifier?: No
Includes Tolerance Ring?: No
Application: Mitsubishi Alternators

Substitutes:
J&N 230-48001

References:
J&N 230-48001