Made of a solid one piece Roto Molded heavy duty PE plastic these kennels are simply puta |"The toughest dog boxes on the market today!" Designed by dog trainers and outfitters for dog handlers and outdoorsmen; the TruckVault TruckTuff kennels are stackable, can be locked together, are easy to clean and come in three convenient sizes that fit easily large and small vehicles alike. TruckVault TruckTuff Dog Kennel are as tough as they come and we set out to prove it. First the kennel was dropped from a height of twelve feet with no noticeable effecta |so we kept trying! After four drops from well over 20 ft. the kennel showed only scratches and a few bumps and bruises from the concrete; no splits or cracks were evident. All TruckTuff kennels feature heavy duty molded plastic doors for extra durability in adverse weather conditions.