b' Features: 2.5 hard drive can support 7-15mm thickness, up to six 2.5 hard drive. Comes with 2.5 inch / 3.5 inch HDD mounting screws. Easy to install and use. Good heat dissipation, durable structure, strong compatibility, large capacity. Multi-functional combination of multi-use to enhance the use of optical drive space value. Standard 5.25 inch device,fit for 2.5 inch/ 3.5 inch hard drive, with a variety of installation mode. Specifications: Model: MR-8802 Material: Engineering Plastic Color:Black Size: 150x145x4mm/5.9x5.7x0.16in Support Hard Disk: 2.5 hard disk / SSD + 3.5 hard disk / device Installation standard: 5.25 chassis optical drive bit Weight:120g Note: 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. Package includes: 1 x Hard Drive Conversion Rack 1 x Screws Pack'