Occupare Vita Exceptional Quality 3-Piece Acrylic Airlocks (4) SUPER FAST SHIPPER ~ MOST ORDERS SHIPPED SAME DAY, EVEN ON SATURDAY! (unless handling time is set for more than 1 business day) Exceptional Quality 3-Piece Airlocks manufactured by Quality Reliable Products. QRP 3-Piece Airlocks supersede S-Curve Style Bubble Airlocks in that they're sturdier and easier to clean. QRP 3-Piece Airlocks also provide an advantage over waterless airlocks by allowing a visual assurance of fermentation activity. 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!