1 set Hard Drive Conversion Rack(with 1 pcs Screws Pack,1 pcs Instruction manual) & 1 set Internal SATA Rack(with 1 pcs User Manual,4 pcsSATA Cables,16 pcs Screwsl) Can support four 2.5-inch hard drives.Compatible with 9.5mm and 12.5mm hard disk thickness.5.25 inch drive bay for standard enclosures.Tray structural design,which will help your installation and removal.good thermal conductivity,durability. Built-in long-term silent fan,cooling effect is better.Hard disk read indicator,can fully grasp the hard disk running status.With hard disk detection. Brand Name:OImaster Transfer rate:SATAI (1.5Gbps)/SATAII (3.0Gbps)/SATAIII (6.0Gbps)System support:for Windows 2003/XP/Vista/Win7/Win8.X/Win10,for MAC 10.3 or above,for Linux Brand Name: OImaster Model Number: MR-8802 & HE-2006 External Interface: ESATA Good heat dissipation, durable structure. Multi-functional combination enhance the use of optical drive space value. Strong compatibility, large capacity. Easy to install, and use conveniently. Support hard disk: 2.5inch hard disk / SSD &3.5inch hard disk / device Installation standard: 5.25inch chassis optical drive bit Color: black Material:Plastic & plastic + aluminum Hard Drive Conversion Rack:155 x 146mm Internal SATA Rack:170 x 146 x 42mm Package Contents: 1 set x Hard Drive Conversion Rack(with 1 pcs Screws Pack,1 pcs Instruction manual) 1 set x Internal SATA Rack(with 1 pcs User Manual,4 pcsSATA Cables,16 pcs Screwsl) 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.