This listing is for (4) size "B" right hand thread nut. This will fir standard oxygen hoses. We also carry this item in left hand (OMG108) for use on "B" size CGA023 fuel lines. Made in America by Western Enterprises, this solid brass nut this item ships quick & Free within the continental USA via First Class mail. Select 1-3 Day Priority Mail for only $4.00 at check out if needed sooner.
