440g内光广告布是专为室内灯箱设计的广告材料，具有优异的透光性、色彩鲜艳度和高强度。它广泛应用于商场、超市等室内场所，能有效提升广告效果。选购时，建议注意品牌、规格和价格。使用过程中，需定期清洁，避免硬物划伤，并注意防潮防晒以延长使用寿命。

440g internal light advertising cloth is an advertising material designed specifically for indoor lightboxes, with excellent transparency, vivid colors, and high strength. It is widely used in indoor places such as shopping malls and supermarkets, and can effectively enhance advertising effectiveness. When making a purchase, it is recommended to pay attention to the brand, specifications, and price. During use, regular cleaning is necessary to avoid scratches from hard objects, and attention should be paid to moisture and sun protection to extend the service life.