Drilled rubber bungs (stoppers) – 3/8″ center hole fits airlock. No 2 stoppers fit most wine bottles.

• 5.5 – 1-1/8″ top diam; 1″ bottom diam
• 6 – 1-1/18″ top diam; 1-1/16″ bottom dial
• 6.5 – 1-3/8″ top diam; 1-1/18″ bottom diam
• 7 – 1-7/16″ top diam; 1-3/16″ bottom diam
• 7.5 – 1-1/2″ top diam; 1-1/4″ bottom diam
• 8 – 1-5/8″ top diam; 1-3/8″ bottom diam
• 8.5 – 1-11/16″ top diam; 1-7/16″ bottom diam
• 9 – 1-13/16″ top diam; 1-1/2″ bottom diam
• 10 – 1-15/16″ top diam; 1-5/8″ bottom diam
• 10.5 – 2-1/16″ top diam; 1-3/4″ bottom diam
• 11 – 2-1/4″ top diam; 1-15/16″ bottom diam
• 11.5 – 2-1/2″ top diam; 2″ bottom diam
• 12 – 2-9/16″ top diam; 2-1/8″ bottom diam
• 13 – 2-11/16″ top diam; 2-5/16″ bottom diam