Forest, purchased the multiplier from Newell for our coach. It is excellent to plug into the air chuck on the passenger side of my engine compartment and fill the tires as needed before any trip. I think I purchased the air hose and accessories for checking air pressure etc. at home depot or lowe's. I have the old fashioned readout on the tire gauge but I have seen Wally's and his is digital. Probably much more accurate.
David
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