120mm to 40mm fan adapter plate. Let's you mount a larger 120mm fan in a fan slot that can only fit a 40mm fan. Or vice versa if you want to mount a strong 40mm fan on a 120mm fan slot.

Comes with the 8 screws you'll need; 4 M5 self-tapping screws for the 120mm side and 4 M3 bolts for the 40mm side.

Fits standard 120mm fans and 40mm slots. Will almost certainly fit unless you have a really strange fan; if in doubt refer to the technical drawing and measure your fan & fan slot. ASK ME QUESTIONS IF YOU'RE NOT SURE!

Clearance height is if you are replacing a 40mm fan and it was sitting in a well or something you need to move away from the fan slot to get clearance. It you are changing a 80mm fan, then it doesn't matter just choose the smallest clearance.

This design smoothly enlarges/shrinks between the 40mm and 120mm sizes and has good plenum volume for optimal airflow.

Unlike other adapters, this design completely fills in the frame around either fan so everything is still sealed airtight afterwards and your fan works as efficiently as possible providing airflow.

If you need an adapter for other sizes to other sizes let me know and I can design one for you.

ONLY ONE ADAPTER AND FOUR (4) M5 SELF-TAPPING FAN SCREWS AND FOUR (4) M3 6MM BOLTS INCLUDED.