Features:Only appropriate for 3.5-inch challenging drives, no longer compatible for 2.5-inch difficult drives.A hard disk wishes no less than four screws to repair it at the chassis, so it is satisfactory for your use.Widely compatible, appropriate for HDD 400 six hundred 800 480 680 880 G1 G2 G3 G4 etc.Applicable to maximum desktop computers, to help you set up the harddisk better.Compatible with all 3.5" hard drives, offering good quiet and damping effects.Specification:Material: metalSize: 0.43*0.43in/1.1*1.1cmColor: as shown in the pictureCompatibility: Compatible with maximum HP desktopsPackage Includes: 4pcsNotes:Please allow slight mistakes due to manual measurement.Colors might differ barely for different monitors.