Prag Rubber Industries Private Limited The Prag Group of Industries, headquartered in Lucknow, India, is a leading manufacturer of a wide range of specialty engineering products for the Railroad, Oil Field, Marine, and Automotive industries. Our product range includes Rubber & Rubber to Metal Bonded Products, Polyurethane Products, Air, Oil, & Fuel Filters, Locomotive Equipment, Air Springs, Pneumatic Clutches & Brakes, and Bogie Mounted Brake System for Freight Wagons. Besides the above, we also offer Engineering & Consultancy services for the Railroads and the Sugar Milling Industry.