Free for personal use Google +1 is a registered brand from google, so you can't resell these icons as is or as part of a product to be sold.
DISTRIBUTORS AND BLOGS
You can talk about this set by poiting the download to this link: http://su.pr/2P5MKq
In order to attribute the work to the author, please use this link: http://www.iconshock.com and put in the text "Google +1 icon sets by iconshock"
THANKS the shock team iconshock.com webdesignshock.com themeshock.com