Different birds specialize in eating different sorts of foods. The Bugs Nuts and Fruit Seed Cylinder combines a diverse range of healthy food items into one solid block of feeding. This cylinder is made of meal worms, tree nuts, sunflower hearts, peanuts, raisins, cranberries, and gelatin. It will not melt or crumble, and it leaves no mess beneath the feeder. Use with the Mr. Bird EZ Feeder for Cylinders. It will last for days and days of feeding. This product weighs 680g (1 lb 8 oz).