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This is a replacement power button mechanism for vintage Apple Macintosh PowerMac 8500 and 9500 model computers, including the Workgroup Server 8550. It is a drop in replacement for extremely hard to find Apple part number 922-1543 Power Actuator.
Part is 3d printed, so there may be very small variations in texture compared to the pictures, but it will be dimensionally identical to the original power button.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.