Set of 5 Three Piece Airlocks. Use on your fermenter to help prevent outside air from backflowing.
6/23/18 10:30 PM Central: These have dropped to just $6. That’s the best historical direct from Amazon price I found. Shipping to most US addresses is also free with Prime Membership [Try Prime for Free] or a qualifying order. Prices, shipping and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this this post was published; however, they may differ from those you see when you visit Amazon. Check the product page for current price, description and availability. Also: Recent Amazon Finds and Amazon Fillers Resource Page
More: Recent Amazon Finds