.5 Micron Diffusion/Carbonating Stone w/ 1/4″ Barb.
Use for carbonating, oxygenating and aerating
2/10/17 3 AM Central: This is selling for $5. Shipping is also free with Prime Membership or a qualifying order. Check the product page for up to the minute price and availability. See Recent Amazon Finds and our Amazon Fillers Resource Page to help you put together an order that qualifies for free shipping.
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