Trainworx Peterbilt 379 Heavy Haul With Lowboy Trailer by Showcase Minatures Custom Built N Scale Truck 1:160 is a miniature model truck designed for model railroads and trains enthusiasts. The truck is manufactured by Trainworx and is built to a scale of 1:160, making it suitable for N gauge model railroads. The truck is a Peterbilt 379 Heavy Haul with a lowboy trailer, making it ideal for heavy-duty hauling.