Modernize older industries for your contemporary railroad with this neat accessory. Today's clean air laws require that dust, solvents and particulate matter be trapped before it can blown out of an industry. You'll see these big collectors hard at work on the sides of food processing plants, mills, woodworking plants, furniture factories, chemical plants, textile mills, industrial painting operations and businesses that handle or cut paper. Highly detailed, plastic parts make it easy to model the complex curves and piping found on the real thing.