Premium PVC-coated iron-steel zipper bag with reinforced tap-head for easy squeezing. Heavy-duty coal-coated fabric ensures durability and leak-proof storage. Smooth-gliding metal zipper with anti-rust treatment for long-lasting performance. Ideal for industrial parts organization, camping gear storage, and bulk commodity packaging. Precision heat-sealed seams prevent tearing under heavy loads. Matte finish exterior resists scratches while maintaining professional appearance. Oversized tap-head design allows controlled pouring of granular materials. Perfect for construction sites, warehouse inventory management, and agricultural product transportation.