Get the right couplers for locomotives and rolling stock. Quality designed Kadee couplers feature delayed action uncoupling for realistic operation of your railroad! All couplers are made of plastic and include complete and detailed instructions for easy installation. Units are complete with coupler and draft gear box. All couplers have the same dimensions. Designed for heavy load conditions such as long trains. Medium centerset shank plastic coupler with plastic #817 gearbox in brown (boxcar red). 1 Pair