Laboratory-grade rubber stopper, drilled to accept airlock. Top diameter: 2-1/4 inches; Bottom diameter: 1-15/16 inches.
Note: Sizing information is provided by supplier. Minor variances may occur.
1 × 1 × 1 in
In store grain purchases are by the pound, uncracked only. If you would like grain in 1 ounce increments, or need to have your grain cracked, please order using the website. You will receive an email when your order is ready for pickup.