Actually, since there is no style set for the "weight" and "manufacturer" in the html, there will be no way to do that in the stylesheet.
You either need to go to your admin and go to "Configuration" then "All Listing", and give a line break or two after weight. There should be 4 digits after "display product weight"
Display Product Weight xxxx
Change the last digit to "2".
Other than that, you'll have to open up includes/templates/YOUR_TEMPLATE/tpl_modules_products_all_listing.php
and make some changes to get it the way you want. Let me know if my first suggestion isn't how you want things, and I can help you with the second option.
