X-1 (H2O Audio) iV6-1A3 - Manual (Page 4)

2. Rail Information
Note: The iV6 Waterproof Case is made to accommodate
both 80GB and 160GB versions of the iPod classic. The rails
for the 160GB iPod classic are thinner then the default
rails.
Rails can be identified by
color and by the text that
has been molded into the
bottom of the rail.
Black 80GB Rails
come installed in the case
Grey 160GB Rails
included in this bag
iV6- 80GB iV6- 160GB