12 QRP PLASTIC LID AIRLOCK GROMMETS 1/16" Groove White Food Grade Silicone for fermenting in Mason Jars ~ Bulk Quantities Available SUPER FAST SHIPPER ~ MOST ORDERS SHIPPED SAME DAY, EVEN ON SATURDAY! (unless handling time is set for more than 1 business day) We understand your health concerns. QRP products were developed to help our director overcome prostate cancer. ALL QRP parts and products are BPA-free USDA Food Grade Compliant and are produced by a reputable food container manufacturer. Includes 12 White Silicone GROMMETS fit any brand Mason jar plastic caps (1/16" groove). THE 1/16" GROOVE IS TOO NARROW FOR GLASS LIDS. Grommet easily inserts into 9/16" lid hole (1/2" may be too tight, pushing the airlock into the lid may cause the lid to crack; 5/8" may cause a loose fit for the grommet). Grommet center hole is 3/8" and is the standard size for Fermentation Airlocks. QRP GROMMETS are made of USDA Food Grade BPA-free Compliant White Silicone and produced by a reputable food container manufacturer. PLEASE DO NOT ORDER FOR GLASS LIDS ~ THE 1/16" GROOVE IS TOO NARROW FOR GLASS LIDS. BONUS: A FREE GIFT of an "Our Daily Bread" Christian daily devotional is included with each order. If you aren't interested in the booklet, simply give it away to a Christian friend or trash it. Your Quality Reliable purchase supports WORLD ORPHANS. We appreciate and THANK YOU in advance for your support.