28 x 50 - 6 Mil Flat Poly Bags - Extra heavy-duty Poly Bags are puncture resistant and recommended for protecting heavy weight products like industrial parts and tools from dirt dust and moisture. 28 x 50 - 6 Mil Flat Poly Bags. Extra heavy-duty Poly Bags are puncture resistant and recommended for protecting heavy weight products like industrial parts and tools from dirt dust and moisture. Bags are manufactured from 100% virgin high clarity polyethylene film. Meets FDA and USDA specifications. Close bags with Twist Ties Bag Tape or with Impulse Sealers. • Extra heavy-duty Poly Bags are puncture resistant and recommended for protecting heavy weight products like industrial parts and tools from dirt dust and moisture. • Bags are manufactured from 100% virgin high clarity polyethylene film. • Meets FDA and USDA specifications. • Close bags with Twist Ties Bag Tape or with Impulse Sealers. • Sold as 50/Carton.