Enhanced Cooling System: Equipped with a dedicated fan for superior heat dissipation, ensuring your hard drives operate at optimal temperatures. Durable Construction: Made from robust metal, this bracket securely holds up to four 3.5-inch hard disks, providing a stable and reliable foundation for your storage needs. Space-Efficient Design: Stackable feature allows for significant expansion in your PC case, making it ideal for gamers, video editors, and professionals with extensive storage requirements. Easy Installation: Simple setup process that fits seamlessly into most PC cases, enhancing your system's functionality without hassle. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Color: A: Black / B: White Material: Metal Package Contents: 1 x 4x3.5 HDD Bracket 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.