Laboratory-grade rubber stopper, drilled to accept airlock. Top diameter: 1-1/8 inches; Bottom diameter: 1 inch.
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.