Kadee #505 Six wheel Truck Conversion Kit.
Works well with AHM six wheel trucks and other trucks of that type.
Each kit contains a pair of Draft Gear Boxes, one pair of NO.5®Couplers, #634 Centering Springs, screws, special bolsters and instructions.
Truck mounted couplers permit closer coupling on radii down to 18" without causing binding for most passenger cars. Non-Magnetic trucks should be used with Kadee® Magne-Matic® Couplers. Wheels should be changed on AHM and Athearn trucks. Use Kadee® #521 or #522 non-magnetic wheels.