[TYPO3-shop] doubt about tt_products.CSS.tt_products.LIST.row.even

[Augusto Sacchetto]

Hi all,

I have a doubt about this setting mentioned on the manual, on CSS 
configuration section:

Its the property row, there is an example there:

plugin.tt_products.CSS.tt_products.LIST.row.even = 35

but I really cant figure this out. Could someone explain it a little better? 
Or provide another example?

What that '35' value means?

Thanks!