Avon A7, B7 & C7 Valve adapters. The AVHOSEADP fits all three valves and is available in 2 hose end sizes, 1/2 inch or 3/4 inch. The adapter goes into the valve and holds in place while inflating.
The below referenced pumps in the related products section below have a 3/4″ hose end and will work with the 3/4″ adapters. Threaded C7 valve adapters in related products below.