The Walthers Mainline 910-252 HO Scale Alco PA-PB Diesel Detail Kit enhances vintage Alco PA and PB units with grab irons, lift rings, windshield wipers, MU hoses, and snowplow. Designed for WalthersMainline Alco models, this kit adds historical realism and operational depth to classic passenger and freight lash-ups with easy-to-follow instructions.