Wd Red Pro Wd4003Ffbx 4Tb 7200 Rpm 256Mb Cache Sata 6.0Gb/S 3.5" Internal Hard Drive Bare Drive SATA 6Gb/s black frame Screw hole pattern

black frame Screw hole pattern 105*105mm 125*125mm Connector 3-pin fan header 3-pin fan header Bearing Rifle Rifle Number of blades 9 9 Rotational speed [RPM] 1200 1000 Acoustical noise [dB (A)] 20

full palm support

PWM Controlled Fan with 9 Fan Blade Design

Teflon coated on the heat plate

Wd Red Pro Wd4003Ffbx 4Tb 7200 Rpm 256Mb Cache Sata 6.0Gb/S 3.5" Internal Hard Drive Bare Drive SATA 6Gb/s black frame Screw hole patternAvailable in large capacities with support for 1 24 bays Enhanced reliability with 3D Active Balance Plus technology and error recovery controls with NASware 3. 0 technology Extended drive testing to ensure each drive is tested for extended reliable operation Vibration & Shock protection WD RED PRO 4TB NAS HARD DRIVE Designed specifically with medium or large scale business customers in mind, WD Red Pro drives are available for up to 24 bay NAS