The Walthers Mainline 910-200 HO Scale Passenger Car Exterior Detail Kit enhances realism and mechanical performance for HO scale passenger cars. This upgrade includes stainless steel grab irons, body-mounted coupler boxes with swinging drawbars, bushings, and covers for improved tracking on 24" radius curves and larger. Designed for WalthersMainline cars, it adds prototypical accuracy and durability to your fleet. Ideal for club layouts and museum-quality displays, this kit includes illustrated instructions for easy installation.