Material: Made of high quality aluminum alloy which is specially treated. Rust Resistant. Small and Light: Exterior dimension is 7.9cm high, 1.78cm diameter. The weight is only 36g. Ideal for travel hand pocket. Improved waterproof effect: different from others, we use precision machining and concealed O-ring. Free combination: 3 independent compartments design . You can freely combine them to satisfy your needs. Product Description Keep your pills safe and organized Enhanced waterproof effect Thanks to precision machining and a concealed O-ring, our pill boxes are more leak-proof than before. No space between compartments. Don't worry about your pills slipping out and getting lost in your bag or suitcase. Keep your pills safe and organized Durable aluminum alloy Top quality material. They will never be cracked. Small and lightweight Convenient to carry. Store your pills and put them in your purse or bag. Free combination 3 independent compartments design. Ideal for travel and outdoor sports.