These trucks will greatly improve both appearance and operation of any passenger car model. The 43-R truck was used on all sleepers for the 1938 Chief. The models are fully sprung and assembled,molded in black styrene with added bearing inserts for low friction, and metal wheels and axles for those who want to add wipers for power pick-up. The trucks are designed to fit all brass cars, Con-Cor, AHM , MHP, Limited Editions and just about any other car except Athearns [truck cutout is too small]. The 43-R truck was also used by PRR on the Broadway & Liberty Ltds, NYC's 20th Century Ltd. We have versions for SP & UP as well. Recommended by Limited Editions, Great Brass Fleet, and used on some of The Coach Yard's models. We don't have any 6 wheel trucks. We make 6 versions of the 4 wheel triple bolster style truck in HO: P11J: Models the 4-TC-4, -5, -6, and 4-TCA-1 and -2 trucks for the 1937-1940 Daylights, Sunbeam, and pool chair cars. Trucks have friction bearings, no bolster anchor. P21J: The 4-TC-7 and 4-TCA-3 trucks for the ends of the Lark triple unit diner and all 1941 Daylight equipment except the triple unit diner articulation. Friction bearings and bolster anchors. P21R: Postwar version of the SP trucks, with bolster anchors and roller bearings, for the period of the latter 1950's and '60s. P31J: The 43-R truck with simulated ASF bearings. Used on early ATSF Pullman cars and CRI&P chair cars for the Rockets. P31R: The 43-R truck with SKF roller bearings. Used on many famous trains including the ATSF 1938 Chief; the 1938 NYC 20th Century and Southwestern Limiteds; PRR Broadway and Liberty Ltds, ACL Miamian. Some cars later sold to NdeM and Canada. P61R: 1938 UP/SP COLA/COSF 1-2-3. Used throughout the trains except under articulation and head-end cars. For info, contact D&G Models, Box 641364, Los Angeles CA 90064-1364. email: jimggers@yahoo.com prices as of 1/1/05: P11J, P21J, P21R, P31J, P31R: $14.95/pr P61R: $16.95/pr shipping: $3.50 + $0.25/pr, maximum $11.