18 x 24" - 4 Mil; Case of 250 Heavy-duty clear, lay flat poly bags are perfect for protecting heavy weight products like industrial parts and tools from dirt, dust and moisture Open end bags are manufactured from 100% virgin, high clarity polyethylene film; Meets FDA and USDA specifications for food applications Close bags with Bag Tape, Twist Ties, or Impulse Sealers We offer thousands of poly bags! Choose from many styles and sizes to fit every need