Check your mother board to make sure this is the correct number of capacitors. I have never seen a eMac with a different amount but I assume they are out there. The capactitors in this kit are the exact same size as the originals. The forums at Macrumors.com have some pictures of these boards Here

Capacitor kit for Apple eMac
Capacitor kit for Apple eMac
Item# AppleEmac
$8.00

Product Description

This kit includes the following Rubycon capacitors:

8X 6.3MCZ1800M10X16

6X 16MCZ1000M10X16