Used oxygen regulator sold by Airco that have male fitting on both high and low pressure fittings. The input is limited to 3000 psi and the output gauge registers from 0 to 200 psi. It has been in storage for a while but worked perfectly when last used. There are the normal scratches but no dents or bent parts. I found several used gauges on Ebay from newer models that were listed for prices ranging from $95 to $175. An excellent guage for a garage/hobby shop torch.