An easy upgrade for all Walthers (932-series) and WalthersMainline (910-series) ore and taconite cars, these sideframes are the correct 5′ wheelbase, and based on the high-capacity trucks designed especially for the prototypes that were in service from the 1920s on. Set includes 12 sideframes molded in low-friction engineering plastic, enough to convert six cars. Complete your conversion with WalthersProto 33′ Turned Metal Wheelsets each sold separately, read more here! /