Dulytek® Premium Press Filter Bags are reusable pouches crafted from the highest quality, dye-free FDA-approved food-grade nylon thread that is durable, resistant to boiling and solvents. The new super tight nylon folded seam stitching prevents breakage and blowouts during rosin pressing, providing peace of mind. The bags are turned inside out for effortless filling and handling. Three mesh sizes are available: 25, 100, and 160 micron. Each package contains 20 bags and one flexible packing card making it easy to fill them with your press material.