1. High-purity plastic material, to pressure and impact, sturdy and 2. Contains highly elastic damping sponge to better protect object from damage 3. Sealed buckle design, seamless connection, super waterproof 4. There is an air guide valve, which is convenient to adjust and open the internal and external air pressure Outer size:545x210x105mm Inner size:515x175x100mm Purpose: To store or protect high-value, high-precision equipment Colour:Black Material:plastic Package Contents: 1 x tool box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.