National Trust CJ Wildlife Fat Balls For Wild Birds 6pkExtremely high quality a high fat content and no addition of lime, plus quality ingredients such as black sunflower seeds, chopped peanuts, cereals, seeds and oils. Unique composition balls remain soft enough in extreme cold, but are also great for use in summer shade. The high fat content ensures that the fat balls are suitably water repellent. Net Free supplied without nets making them safer for birds and wildlife and more environmentally friendly.