Adapter fits most helmet hoses with 1-1/4 in ends and has a 2-3/4 in outside diameter to fit inside 3 in duct-style hose or inside some NACA ducts. May also be mounted in a window opening to funnel outside air directly to the driver via helmet hose. Plastic construction, clear. Sold each.
Spec Sheet: Allstar Spec Sheet (PDF)
FAQ
What hose sizes does this adapter connect?
It fits helmet hoses with 1-1/4 in ends and has a 2-3/4 in outside diameter to fit inside 3 in duct hose or some NACA ducts.
Can it be mounted in a window opening?
Yes, it may be mounted in a window opening to funnel outside air directly to the driver via helmet hose.
What is this adapter made from?
Clear plastic.
Is a spec sheet available for this product?
Yes, the Allstar spec sheet PDF is linked above with full product details.

