Figure $11 nut/$11 nipple for a nice chrome plated one. I wouldn't get a stainless nipple/nut unless you have a stainless regulator. Chances are you regulator is chrome plated brass. The only stainless version I know of is an SGT 500/ SGT160. That's the only application I'd use/invest in a stainless CGA 320. ave you money...there is no need for a stainless cga 320 unless you want to keep your stainless regulator all stainless.