Offered here are four Gotoh-branded tuners and 3 unbranded M.I.J. metal knobs from a Landing bass. The tuners ferrules have ~ 14 mm (nominal 9/16") outside diameter. The knobs' shaft hole is ~ 6 mm (~ 7/32") diameter. Those measures are estimates; as close as I can get. The tuners include ferrules, bezels, and screws. Both tuners and knobs are used and functionally perfect. The knobs look nice; the tuners have some scratches and a couple of tiny bare spots on them (please refer to pictures). $39. shipped for the lot anywhere USPS/PM goes.