#6.5 Drilled Rubber Stopper Bung
Pure white gum laboratory stopper drilled with 3/8″center hole to accommodate standard air locks.
Top Diameter 1-3/8″
Bottom Diameter 1-1/8″

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.