FERRODAY 2 Set 0.5 Micron Diffusion Stone, Stainless Steel Aeration Stone

Great product

Works great in carbonating 5 gals of beer or sparkling water. And the included hose fits right over the post with no need to use a hose clamp.

EDIT: Seller contacted me, and offered a refund since I had issue with the product. I've added another star, since the seller is very attentive with customer service which is important to me when making a purchase. It's and air stone, and passes air. I was wanting to use it in my fish tank, and it does not seem to make bubbles any smaller than no airstone when adapted to my sponge filter.

These produce a very fine mist of bubbles and seem to withstand nitric and NO2 gasses with a dozen uses an no obvious corrison. They are outstanding for ad-hoc nitrogen oxide gas absorbers. The main downside is the pressure required to achive throughput, several PSI, at the hairy edge of typical glassware.

Excelente calidad y llegó antes de la fecha estimada a colombia

Works great, charges kegs way faster

As with some others, mine was defective with all the bubbles coming out of 3 or 4 areas… all VERY large bubbles; almost like right out of the tube. ***EDIT*** I got a replacement, and it was much better… not as good as I’d like, but a solid 3.5 star, rather than the 1 star originally given.

High quality at a fair price. Nice even flow, just following initial use instructions.