Mid-grade. Selenium sea edible oil belongs to the mid-range grade on the market. Its specification is 5L. The raw material is rapeseed. It is produced by physical pressing. It has sufficient net content and good production technology. The manufacturer of selenium sea oil is Jiangxi Selenium sea oil. Co., Ltd. is a joint-stock enterprise engaged in grain and oil processing using high and new technologies. It is also a leading enterprise in municipal agricultural industrialization.