Blue shooter/plunger inner spring used on some DE/Sega/Stern machines.
Can also be used on other manufacturer's machines, but their color codes for strength are different. The springs we sell are color coded per Stern's hierarchy of spring strength.
DE/Sega/Stern #266-5001-05.
Spring tension from lowest to highest:
Blue (266-5001-05)
Green (266-5001-04)
Standard (10-148-1)
Orange (266-5001-07)
Purple (266-5001)
Gray/Silver (266-5001-14)
Red (10-148-2)