400g防水喷绘布是一种密度高、防水性能好且强度高的喷绘材料，色彩还原度高，适用于户外广告、活动布置和商业装饰等场景。选购时需根据用途选择，注意色彩还原度，并选择正规供应商。

400g waterproof printing cloth is a high-density, waterproof, and high-strength printing material with high color reproduction, suitable for outdoor advertising, event decoration, and commercial decoration scenes. When making a purchase, it is necessary to choose according to the intended use, pay attention to color reproduction, and choose a reputable supplier.