Dimensions - (internal): 8.4” x 4.4” x 2.3” inches (external) 9.5” x 5.8” x 2.8" / weight 1.31 lbs. Automatic Pressure Equalization - Twist lock latch doubles as an air release valve to provide stable pressure in each case. 3X Secure Locking Latches - Twist Lock Latch provides three levels of security for valuables; waterproof protection with latch sealing o-ring; twist lock prevents accidental opening; keyed lock keeps others out; great for safe storage or theft prevention. Protected for Life - All Seahorse cases are protected for life; you’ve invested in our cases, so we’re here to protect that investment; if you experience any issues with your case, we’ll help make things right. American Made - All our cases are manufactured to the highest quality right in Southern California. Waterproof - Rated IP67 waterproof, each case is made to keep water out even when submerged; each case can be submerged at a depth of 1 meter for 30 minutes while keeping the contents inside completely dry. Protective Rubber Liner - Inside each case is an egg carton style protective rubber liner, providing plenty of cushion for any gear you put inside of it with occupying a minimal amount of storage space. Heavy Duty - This case is made from a high quality and high-density polypropylene, so it can take a beating, impact resistant, crushproof, dustproof and waterproof. Made for Small Valuables - Designed and engineered to provide the best protection for small valuables while minimizing space; compact size and airtight; perfect for storing and protecting ammo, small pistols, multimeters and tools. Twist Lock Latch closure. Rubber lining. plastic.