Which Samsung Printer Toner am i supposed to pick?

Hey everyone, I was wondering what Samsung toner I'm supposed to pick. When my printer prints, the quality of the print has less color, so i assume it is almost out of ink. So, I was wondering, do i get the toner which is this





http://cgi.ebay.com/Samsung-ML1740-ML1710-ML-1710-ML-1740-ML-1750-Toner_W0QQitemZ140231380187QQihZ004QQcategoryZ99302QQssPageNameZWDVWQQrdZ1QQcmdZViewItem





or something like this





http://cgi.ebay.com/3-Pack-Samsung-ML-1710-ML-1750-ML1710-ML1750-ML-1740_W0QQitemZ330234701638QQihZ014QQcategoryZ99298QQssPageNameZWDVWQQrdZ1QQcmdZViewItemWhich Samsung Printer Toner am i supposed to pick?
If you let us know what model samsung printer you have we can direct you to what you need.