... clients.7.1 standard width: 120mm, 150mm, 250mm, 300mm, 350mm, 450mm, 500mm7.2 standard length: 100meters ~ 5000meters (1meter = 0.9144yards)7 ... , moisture-proof, waterproofing, dustproof, corrosion preventing. stretch film hand roll - 450mm X 300m X 12micron