High pressure, low pressure, stainless, What kind of tubing do you need?
If stainless, any stainless can be made O2 compatible. Clean it with simple green (5:1 dilution) and rinse with scalding hot water. If you need high pressure flexible tubing, use any of the non skive hoses from any number of manufacturers (Eaton, Parker, Swegelok, etc.) with a 100R8 rating. They are teflon lined, but you can't put the ends on yourself unless you get the ferrules from the hose manufacturer. Both of the above options are good to 5,000 PSI minimum.
If you are just looking for some hose to transport the O2 to the blending stick for a CB system, the easiest and cheapest is welding hose from your local welding supply house. They will also sell you the ends to make the hose as long or as short as you want. It comes O2 ready. I use Prestolok fittings and hose from Parker. They are good with any polyethelyne, polypropylene, or nylon low pressure tubing and don't take any special tools to use. If you go this route, get a few spares. They are easy to order, but if one goes bad, you can't repair it. That means you are down until your replacement order comes in.
