These are high - quality Kadee / 1898 Andrews fully sprung self - centering metal trucks for HO scale models. They come with Code 110 (.110 wide) 33' ribbed - back RP - 25 wheels. The pair is identified by Part # 380 - 553. Mount them easily with a #2 or 2 - 56 screw. The Andrews truck, a long - lived design from the turn of the century (made from 1910 through the 1930s), is a milestone in modern freight truck development with its cast frame. Journal boxes are bolted to the main frame. It was used until the end of the 1950s, mainly for lighter applications like refrigerator cars and might still be used on logging railroads. The trucks feature code 110 wide wheels, self - centering ability, accurate markings, incredible detail true to the prototype, non - magnetic metal wheels, highly flexible sprung trucks, metal side frames, a fully sprung bolster, smooth - tracking free - rolling contoured insulated axles, and RP - 25 free - rolling wheels.

Using these trucks is easy. First, grab a #2 or 2 - 56 screw to mount the trucks on your model. They are designed for HO scale models, so make sure your model is of the right scale. When using, you'll notice how smoothly they roll and track. The self - centering feature helps keep things stable. As for maintenance, it's a good idea to check the wheels regularly. If they get dirty, use a soft cloth to clean them gently. Avoid using harsh chemicals as they might damage the non - magnetic metal wheels. The sprung trucks are highly flexible, but be careful not to apply too much pressure that could bend the metal side frames or the bolster. Keep them in a dry place when not in use to prevent rusting. With proper use and care, these trucks will last a long time and enhance your model railway experience.