Rubber stopper drilled with 3/8'center hole to accommodate standard air locks. Top Diameter 1 5/8' Bottom Diameter 1-3/8'
Rubber Stopper- Size 8-Drilled
3/8" Drilled Center Hole
Accommodates Airlock
Rubber Stopper- Size 8-Drilled
3/8" Drilled Center Hole
Accommodates Airlock