All stainless steel and precisely machined here in California. Designed to promote yeast growth by drawing in atmosphere and aerating fermenting wine.

Air inlet fittings sizes:

• 1.5" Tri-clamp has 3/8" FNPT.
• 2.0"/3.0" Tri-clamp has 1/2" FNPT.

Here's a video of the aerator in action: