MATERIAL : Plastic
Color : Black
Outer Diameter : Approx. 3cm / 1.2 inch
Height : Approx. 5cm / 1.9 inch
End to end length= 1 15/16"
Hose End Diameter= 13/16"
Halkey-Roberts End Diameter= 13/16"

Item Ad picture accurate. Great adapter to allow air to move through. Perfect for what it does. Just what what You needed.
It has the crossbar to open the valve when inserted, Huge time and effort saver.
Great fit for inflatable SUP, pontoon raft, dinghy, inflatable kayak, inflatable boat, inflatable paddle board, inflatable gymnastic mat, inflatable dock, inflatable water trampoline, airtracks, etc.
Adapter works with the electric/hand pump! Fits perfectly and works well to connect the Pump to Aqua Plus SUP, Water Skeeter Vision pontoon raft, Driftsun 220 inflatable kayak, inflatable BoteBoard kayak, Sea Eagle FKS16, Aquaglide ...
This air valve adapter also fits and works great with the Dewalt air inflator, Craftsman air pump/compressor, Ryobi inflator, Air Elements, etc.
Compatible with the electric pump and sup boards from Costco and BOTE.

This H-R adapter fits HR valves perfectly and seems like it is well made. Good tight fit in a 3/4" ID Nylon hose. Probably is great for most HR applications, but wanted other owners to know.
Attached adapter inside a vinyl tube which was then attached to an air pump/compressor. Worked good for high volume/ low pressure. You needed a separate adapter for high pressure low volume to get to 15PSI. Worked exactly as advertised and as You needed .
It makes inflating and deflating the pontoon tubes very easy. Rigged it up to the air compressor for quick and easy filling and I made my own adapter for the vac hose to deflate for storage at the end of the season. This thing plus a little Mcgyvering and you'll ever wonder how you lived without it. It does work well with most of the pump.