Sunflower seeds are selected from superior varieties, such as local model number 361,363 and 601,etc. We purchase sunflower seeds from farmers, and choose carefully to ensure the quality. In our factory, every step of the process is strictly required. We uses advanced equipment to select, after several procedures and screening, the best seeds were selected. The seeds plump and bright in color, the shell is mostly black. As for the size or model number ,we can try our best to meet customer's requirements.