SKB Watertight Cases come in two styles..... "Pelican" Style Cases: SKB Watertight Cases are molded of ultra high-strength polypropylene. They feature a gasketed; water and dust tight; submersible design that is resistant to corrosion and impact damage. The cases have a patent pending "Trigger Release" latch system and come standard with either layered convoluted foam, cube foam, or empty. Military Style Watertight Cases: SKB's Military Watertight Cases were designed to meet the most demanding military specifications They are airtight and waterproof and rotationally molded for strength and durability to withstand the most demanding shipping conditions. They feature black stainless steel military style hardware and they are padlock lockable. Cases come standard with cubed foam, layered foam, or empty. Some cases have telescoping handle and wheels. Casters for some models are sold seperately. SKB's unconditional Lifetime Guarantee: YOU BREAK IT...SKB WILL REPLACE IT....FOREVER