This an HO Scale set of trucks and third rail beams for the CTA 6000 series cars or the 1-50 Series single cars. This represents the Clark B-2/B-3 trucks used on all PCC type rapid transit cars used by the CTA (5000s, 6000s, and 1-50). The set includes enough parts for two trucks (one car's worth), one lead truck with track trips and one trailing truck without. Also included are two types of third rail beams, one with sleet-scrapers for the lead truck and one without for the trailing truck. Each truck requires a pair of 26inch wheelsets with flush ends available through NWSL. To assemble the truck, Place the wheelsets in the upper portion with the track brakes. Cover with the lower rectangular portion and screw into the frame. The truck includes a 2mm diameter hole for a screw.