This is a reconditioned part we sell from used inventory. The adjuster is checked for no pitting in the push rod area and soundness of threads and body. We thoroughly sandblast, clean, and polish. A new jam nut is provided. We then cosmoline and package. We offer $5.00 exchange for sound adjusters as a credit for our reconditioned adjusters. Earlier B tractors used a B208R adjuster and we have a limited inventory of those. Please see our total rebuild kit for tappet lever assemblies in KITS. The part numbers are GP-TLPKB/50 and GP-TLPKB/USB.