[Solid Material]---High-hardness PP material is adopted to protect the hard drive box which tightly fitted to ensure that your hard disk is free from moisture, anti-static and dust-proof that the high quality polypropylene material is more durable and stronger to use | [Multiple Protections]---Waterproof EVA exterior protects your device from everyday knocks and bumps--One-piece molding, with high-strength rib design inside and outside;The built-in EVA reinforced shock-resistant cushions wrapped on both sides are rigid on the outside and flexible on the inside to reduce external hard drive case vibration and make your data storage more secure | [Size&Compatibility]---Max compatible dimensions(outside):7x5.03x1.53 inches (inside):6.1X3.93X1.1inches; 3.5 inch internal drive portable case can be applied to various 3.5 inch SATA/IDE hard drives which can easily fit into any backpack or briefcase | [Functional Storage]---The label stickers help users organize 3.5 hdd case efficiently, which is convenient for you to perform a more scientific classification and archive management of the vast data.Variety of colors to choose from,make more hard drive enclosures stacked neatly and stably, and at the same time subtly reduce the space occupation and clutter of the desktop | [3.5 Hard Drive Case]---The card slot design is easy to stack up and down with the design is highly fit, slim line design allows hard drive case to easily fit into any backpack or briefcase. Good customer service gives you a better using experience