Aluminum Heatsink for A4988 DRV8825 Stepper Motor Driver The Aluminum Heatsink for A4988 DRV8825 Stepper Motor Driver features thermally conductive adhesive tape at its attaching side which helps cooling effect to occur more rapidly. The installation includes only removing the heatsink protection and sticking it by gently pressing the Aluminum HeatSink against the Stepper Motor Driver. They are made up of Aluminum which is the good radiator of heat. These are very lightweight and handy heatsinks which show good heat dissipation property. 9 x 9 x 5 Aluminium Heat Sink for Laptop, Notebook, Computer, LED, Power IC, Memory, Transistor with High conductivity thermal self adhesive tape 3M 8810 for A4988 or DRV8825.