This is a 25Mhz math co-processor (Floating Point Unit) for some Amiga memory cards and accelerators. It will accelerate all maths intensive programs and allows your Amiga to software that requires an FPU.
It is in PLCC format so check compatibility with your accelerator/ram board. This FPU is also compatible with the Commodore 030 CPU card for the Amiga 4000.
Motorola Part No: MC68882FN25A
PLCC Extraction Tool