In order to cater the development of bag making technology and meet the needs of customers, our factory has introduced the flat bottom with quad seal machine and technology, flat bottom with quad seal bags increase the product packaging volume and looks like a box-shaped to show on the shelves display, it seemed much better than the traditional three-sides seal bags, it also can achieve a good shelf-life effect, so many brands have adopted. Welcome to contact our customer service staff at any time and ask for the details.....