The addition to our Long Series of premium, waterproof protective case, the 991 is our widest at over 20" (511mm) making it perfect for camera equipment like tripods and lighting, industrial equipment, rifles, guitars, RTK stations, bows, telescopes and lots of other long, wide equipment. It's built to be fast and smooth with stainless steel ball-bearing wheels and three spring-loaded handles that make it the perfect low profile waterproof and dustproof hard case that can be thrown in a truckbed, stacked on a pallet, or helicoptered in for a photoshoot.