Features: 100% brand new and high qualityWidely used for 3.5 inch hard drive disks.Durable acrylic material DIY hard disk bracket, elegant transparent style.HDD rack is a necessary part for your computer, which is practical and convenient.There is a installation screw package, accurate installation hole is easy to install.Equipped with a mounting screw pack, let you totally experience the fun of DIY, make your computer components look cooler and more fashionable. Package Includes: 1 Set HDD Shelf DIY Tools( As Below A B C optional )A. 10 Layers includes: 40x Hard Drive Screws12x Fan Screws6 x Fan Fixing Strips2x Pieces Of Acrylic BoardB. 4 Layers includes: 24 x Hard Drive Screws8 x Fan Screws4 x Fan Fixing Strips2 x Pieces Of Acrylic BoardC. 6 Layers includes: 16 x Hard Drive Screws4 x Fan Screws2 x Fan Fixing Strips2 x Pieces Of Acrylic Board Specifications: Material: AcrylicColor: TransparentUsed for: 3.5in HDD RackSize: Approx 37x21cm/14.57x8.27in (10Layers) 21x18cm/8.27x7.09in (4 Layers) 25x21cm/9.84x8.27in (6 Layers) note: Only include HDD shelf DIY tools, without cooling fan and hard drive.Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand.Please allow 0-1cm error due to the manual measurment.