Type of product: Barb reducer/Air Barb Specification: 1 inches Spg x 3/8 inch barb Most common size reference: 1 inch Outer overall dimensions: Length: Diameter: Internal Diameter: Commonly used with: 1 inch socket connectors. 3/8 inch vinyl pipe Additional notes: Best to use a plumbing cleaner, pipe cement then a metal clip to assemble. You would push the vinyl tube over the top of this. Commonly called an ozone barb usually because it feeds the ozone jet with an in-line ozone injector added.