Banggood

Used for cooling fan cover for hot end of 3D printer. I couldn't touch the fans suddenly, so I was relieved.

安くて防御力も抜群。 何個あっても良いですね。

Got them today, I haven't fitted them yet but they look well made 😁

buen producto

Marchandise reçue rapidement et bien emballé et de très bonne qualité merci beaucoup

All good. happy with the purchase and can confirm they are 40mm.

works well on a 40mm fan on a RC car motor.

Fits perfectly on 40x40 fans!

sin problemas tal como se describe el producto

If you like me have a 3D printer with the hot end blower / fan unprotected you have to buy one of those. Of course it is near to impossible either hurt yourself or damage the fan but believe me this is one you must have !!!! to protect yourself from when accidentally put your finger in the fan's blades !!!! LOL