Powerpak produce silo bags which is used to store grain & silage, with a diameter of 2.4m (8 feet)-3.6m (12 feet), a length of 60m (200 feet)-150m(500 feet), and a thickness of 200 microns (8mil)-300 microns (11.8mil). The product is produced with 100% new materials, and is packed in high-strength corrugated boxes. It is equipped with tie ropes, repair tape and instructions for use. The scale of bag extension can be stored for up to 2 years when properly used outdoors.