– These sample mesh bags come filled with SEB9 sample extraction buffer. The bag provides an easy and effective way to grind plant samples. Simply cut open the bag, add your sample, and rub the outside of the bag with a pen or roller. The special mesh lining of the bag aids in the maceration of plant tissues and the heavy plastic prevents the bag from ripping. SEB9 buffer filled mesh bags are used for testing with select ImmunoStrips.