Size 120mm 

 Color Black 

 Structure of triple 

 Instructions for use: there are four standard screw holes on the back, double-sided plastic can open, inside air filter out repeated cleaning, very convenient. 

 Role to reduce the damage of the dust on the fan bearings, extending fan life, and to prevent foreign matter and your precious fingers touch the rotating blades. 

 The role of two to reduce the intrusion of dust on the chassis. 

 Send four screws