QRP AIRLOCK STOPPERS #000 3/8" Food Grade Beige Silicone Rubber Bulk Quantities Available (12) SUPER FAST SHIPPER ~ EVEN FOR ORDERS RECEIVED BY 5 PM CST ON SATURDAY! (unless handling time is set for more than 1 business day) 12 Quality Reliable Products BPA-free Food Grade Beige Silicone Rubber Stoppers #000 Stopper (13mm top, 9mm bottom, 25mm length) insertsinto 3/8"Grommet hole 3/8" inside diameter Grommet center hole is the standard size of Fermentation Airlocks BONUS: A FREE GIFT of an "Our Daily Bread" Christian daily devotional is included with each order. If you aren't interested in receiving the booklet, simply send a message when placing your order and request that we withhold the gift. Thanks for your consideration!