IDLER ARM #3893327 nos??? GM 1960's. I don't know for certain that this is NOS. It still has the little wire that held the label but the label is gone. I don't see any scuffs where it might have been installed. It rotates hard by hand and there is no up and down movement at all. Shipping will be by USPS medium flat rate priority box @$18.40 to U.S.A. addresses.