E-clips are used in various sizes by all pinball machine manufacturers.
Choose the size of e-clip you need from the drop-down menu above.

Ball shooter plunger (rod) e-clip 3/8" 
Bally/Williams reference #20-8718-1.
Jersey Jack Pinball reference #94-004011-12.

Williams reference numbers 20-8412-37, 20-8712-25, 20-8712-18, 20-8712-12, 20A-8712-12.
Data East/Sega/Stern reference numbers 270-5012-00, 270-5002-00, 270-5001-00, 270-5000-00.
Bally reference number P-2891-8.