Coles Wild Bird Products Oil Sunflower (OS08) is over 99% pure and has been cleaned four (4) times just to make sure that you’ll get more seed and few sticks. This soft, thin shell and high oil content make this product a bird’s favorite type of sunflower and is also great for year round feeding. You want as much oil as you can get in your sunflower because that’s what attracts most of the birds. The Cole’s Wild Bird Products Oil Sunflower (OS08) is the perfect sunflower seed because of its high grade and high oil ingredient inviting more birds at your bird feeder. This product weighs 8 pounds.