HO 13,000-gallon Acid Tank Car in the PROX series is a detailed HO-scale model designed for realistic freight operations on HO layouts. It reproduces an acid tanker with two body phases representing early and late designs, prototype-appropriate top platforms, and separate wire grabs and handrails for an authentic on-layout silhouette.

It rides on trucks with animated rotating bearing caps, features full underframe detail including air brake reservoir, control valve, and brake cylinder with plumbing, and a complete set of etched walkways, end sills, coupler hardware and hoses. The car uses body-mounted McHenry scale double-shelf knuckle couplers and machined metal wheels with RP25 contours for reliable operation on most HO tracks. Multiple road numbers are provided across singles and 3-packs, and the design supports smooth operation on curves with a minimum radius of 18 inches.