ITEM NAME:20pcs Chip To220 Aluminium Heat Sink Cooling Module for Transistor Device Description: Scope of application: transistor heat sink Machining into slotted fine teeth to enhance heat dissipation Processing method: Anodizing + drilling + stamping a fixed column Material: Aluminum Size: 15* 11 * 21mm Package Includes: 20x heat sink 20x Screws SKU: DMO0011809263014785.Scope of application: transistor heat sink. 20x heat sink. Machining into slotted fine teeth to enhance heat dissipation. Material: Aluminum. SKU: DMO0011809263014785. 20x Screws.