10 Packs TO-220 Aluminum Heatsink & Insulator/Mounting Kits for TO-220 MOSFET Transistor, TO-220 Heatsink + M3 Screw + Screw Washer + Insulator Rubberized Silicone (20mmx15mmx10mm)

I used these on some TO-220 SCR's & they work well. All the supplied screws thread up nice to the sinks & the sinks seem to be well-machined of light-weight aluminum. They are conductive, but with the included sil-pads & insulators you're all set.

Good value great quality heat sinks. Everything included.

These are just sufficient for lower heat dissipation requirements.

I don't know about Amazon's rating "Warmth" & "Sheerness" but these will work in most TO-220 type heat sinking operations

These are perfect for the small prototypes we are making with IGBT transistors

Love it

These heatsinks are well made and easy to use. Unfortunately they are also too small to sink any appreciable heat. In use with a TO-220 7812 voltage regulator, one of these gets so hot it will nearly burn you. The sink is just too small to dissipate the heat generated by normally operating TO-220 devices. Great idea, just undersized for what it is supposed to do. Shopping for a similar but larger product.

Good product