To220 heat sink 12 5 deg c w trusemi bk t220 0062 to220 heatsink aluminium material black anodized finish 12 5 c w thermal resistance bolt on 37mm long 19 8mm wide 21 6mm high a pre drilled black anodised heatsink for use with either one or two to220 packages compact space saving design trusemi bk t220 0062 twin to220 heatsink