2 3/8″ x 1 11/16″ (60.5 x 42.9 mm)) solid medium universal stopper
This tapered rubber stopper has a longer taper for a better seal. The lip around the top prevents the stopper from falling into a carboy. This size stopper will fit the 3, 5, and 6 gallon plastic carboys.

California Proposition 65

Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.