📐 Precision Outer Size (外部尺寸) Fit

All sizes listed are Outer Dimensions. Each box is engineered with a precision manufacturing tolerance of ±1mm to ensure consistent fit. Whether you need custom mailer boxes for your Amazon FBA shipments or everyday order fulfillment, our Extra Hard (特硬) Kraft material guarantees your products arrive safely.

🛡️ Key Features

• Extra Hard (特硬) material — maximum crush resistance
• Ideal for heavy items: books, tools, glass bottles, electronics
• 7-layer B-flute corrugated for superior stacking strength
• Higher puncture resistance than standard corrugated
• Brown kraft exterior for a professional, unbranded look

🚚 Shipping & Logistics

• Shipped flat-packed — easy storage, no assembly tools required
• Lightweight design reduces dimensional weight shipping costs
• Stackable — saves warehouse space when stored flat
• Compatible with automated packaging lines and manual packing
• Bulk discounts available — contact us for volume pricing

🏭 Why Buy From Us?

• Factory Direct — We manufacture in Dongguan, China, with 15+ years of corrugated packaging experience
• Bulk Pricing — Wholesale pricing from 100 to 100,000+ units
• Custom Sizes — Need a non-standard size? Contact us for custom quotes
• Fast Shipping — Global shipping via sea, air, or express courier
• Samples Available — Order samples to test quality before bulk purchase

📦 Wholesale & Bulk Orders

We are a professional packaging manufacturer specializing in corrugated mailer boxes. All products are sold wholesale — ideal for:

• Amazon FBA / Shopify Sellers
• TikTok Shop & Etsy Store Owners
• DTC (Direct-to-Consumer) Brands
• Small Business Shipping & Fulfillment

Contact us on WhatsApp for custom quotes, bulk discounts, and size requests.

📲 Contact us on WhatsApp for custom quotes, bulk discounts, and size requests.