Red inner plunger spring. This is the highest tension ball shooter spring available for shooter rods .042" wire diameter.
Premier #26028
Williams/Bally #10-148-2
Spring tension from lowest to highest
Blue (266-5001-05)
Green (266-5001-04)
Standard (10-148-1)
Orange (266-5001-07)
Purple (266-5001-10)
Gray/Silver (266-5001-14)
Red #266-5001-02, #10-148-2
Change the outer barrel spring at the same time #SPRG-0007
