This is the HO Scale Con-Cor Superliners Oper. Pass. Car Diaphragm (1 set) (Gray) from American Limited Models.
Operating passenger car diaphragms are accurate models of specific prototypes. Easy-to-build kits feature injection-molded plastic parts, in black or gray plastic. Sprung to hold together on curves down to 24" radius, no minimum radius limitation. Will not interfere with operation of most couplers. All kits include complete instructions.
Improve the operation and appearance of your Superliner fleet. Simplifies installation of knuckle-type couplers (sold separately) and provides prototypical close-coupling between cars. Kits include diaphragms molded in gray plastic, coupler and truck adapter in black plastic, plus mounting screws.