ITEM NAME:Aluminum Heat Sink TO-220 Heatsink Kit Cooler Cooling for Transistor Description: - 3 types heatsinks,each size 10Pcs,15*10*17mm/15*10*21mm/15*7*17mm - 30 TO-220 Insulated Particle, 30 To-220 Insulating Sheet, 30 M3 Screws - Uses: Motherboard Transistor heat sink - U-shaped design saves space, comprehensive veneer IC cooling - material: metal Package Included: 1Pack Transistor heat sink kit.Uses: Motherboard Transistor heat sink. - U-shaped design saves space, comprehensive veneer IC cooling.