Hetasink 40x40x20mm

used with thermal epoxy to shape to my needs

Good quality, well made.

Very well machined parts, keep stuff cool. Would buy again

worked great for what i needed...got a 20percent diff

Good quality manufacturing. Specs were right on and edges are clean. Not quite sufficient for peltier cooling even with a heat dissipation fan and thermal compound but likely be good enough for other light duty applications.

Perfect for 3d printer stepper motors!

Even smartphones. Mine uses 25 watt charging. My phone gets some heat when I leave it alone to charge, that's when it's getting 25W. I set two of these down on the screen, and wala it stays much cooler when charging. This will prolong the life of my phone, including the battery.

They seem to be of decent quality. They don't really absorb and dissipate much heat though.

Well made words as expected

These have very nice thermal transfer. They seem to be of pure aluminum, because they work better than a similar shape and fin style heatsink of 40% larger area and mass. Easy to drill and machine.

WiFiルーター子機が過熱するので、貼り付けてみました。ヒートシンクが暖まっているので、効いていると思います。

These feel weighty compared to similar "spiky" heatsinks. The extra thermal mass will soak up more heat. Plus they are uncoated/bare so no black paint to absorb sunlight or hinder emission. The sticky tape is fiendishly strong - once it's on it's staying on! Real quality.

アルミのヒートシンクの裏には両面テープ式の熱伝導シートが貼られていますので簡単に取付が出来ます。 対象物をアルコール等で脱脂して取付けて下さい。両面テープは薄いですが平面ならしっかりと貼り付きます。 夏性の植物に90Lのビニール袋をかぶせて水槽用のヒーターを使い、ミニ温室を作ったのですがそのままでは放熱が悪く、この放熱器を付けるとしっかりと熱が放熱され若干温度が上がるようになりました。 そもそもコンピューターチップの上に直接取り付ける物ですが触って熱いと感じるネットワークのハブやルーター等のケースの外側に局所的に貼り付けてもケース内部の熱を取るのに良いかも知れません。