HO Brass - Some many years ago when PFM ceased operations, I was able purchase many sets of new old stock drivers for several models, but in this case, I bought several sets of new drivers for the Tenshodo Big Boy 4-8-8-4 model circa 1984. Over the years I have used all of them replacing drivers in my personally owned models, but I have this few of them left. In this lot are 3 each sets of geared driver axles with bearings. These are new (NOS) and never used. 1 NOS set of drivers with the PFM sound cam (even though, it's not a cam at all, its round and has the brass pickups for the sound unit pickup arm). Also included are 3 other axles that are used, but functional. One of the used sets is geared, but has blind drivers (no flange), of the other two axles, neither are geared, but one has blind drivers and the other has flanged drivers. These are meant to be for someone who repairs models or just needs a single set or two for their model. The group is not intended to be a complete set for a single engine. At most there are enough to fit 4 axles onto one engine (two geared and two non geared, flanged). Study the photos well, as this is everything that you will receive. There are no shorts in these, the used ones were switched out because they are blind, one used one was switched only because all the others on the receiving model were being replaced with new ones. Parts lot sold as is, they will fit all years of the Tenshodo made UP 4-8-8-4, (Although, some of the earliest models may not use the bearings). The one with the sound pick up will only fit the later runs with PFM sound capability unless the cam is removed or the frame cover plate is modified. The Ships via USPS. Shipping to the lower 48 states (USA) is included in the price.