Flat-Shipping Die-Cut E-Flute & B-Flute Corrugated Box Inserts Engineered for ISTA Drop Protection
Custom corrugated inserts precision die-cut from 32–44 ECT E-flute and B-flute board with air-cell buffer walls, bottle neck-locks, and full-color CMYK printing for DTC mailers and shipping cases.
Custom corrugated inserts are internal structural trays, suspension collars, and multi-cavity platforms die-cut from 32 ECT and 44 ECT E-flute (1.5mm), B-flute (3.0mm), and EB double-wall fiberboard. Engineered to create a 12mm–25mm crush-absorbing air gap between fragile bottles, jars, or electronics and the outer shipping box walls while shipping 100% flat prior to assembly, they keep your entire package mono-material curbside recyclable. Wholesale orders start at 250 units from $0.20/unit with 10–14 business day turnaround and Always Free DDP Shipping.
Custom corrugated inserts are the workhorse internal protection choice for DTC e-commerce brands replacing plastic foam and bubble wrap without sacrificing parcel survival rates. Because corrugated fluting acts as thousands of tiny I-beams between two kraft liners, a cleverly folded E-flute or B-flute insert suspends heavy glass candles, ceramic mugs, beverage cans, and electronics away from outer carton impact zones—passing ISTA 3A multi-drop parcel simulations while going straight into the customer's household recycling bin.
Our CAD team engineers corrugated inserts that balance fast warehouse fold times (typically 3 to 6 seconds per insert) with tight dimensional lock:
Send us your primary item dimensions or outer mailer SKU and receive a custom 2D/3D insert dieline free of charge. Wholesale orders start at 250 units from $0.20/unit with 10–14 business day turnaround, Always Free DDP Shipping, and our 30-Day Free Reprint & Return Guarantee.
See how businesses across different sectors use this packaging
Double-wall air-cell collars suspend 8 oz to 16 oz glass candles 15mm off all six box faces.
Contoured bottle-neck and base locks keep glass condiment bottles immobilized during UPS/FedEx drops.
Full-color CMYK E-flute platforms stage 4 to 8 differently shaped monthly items cleanly.
Folded corrugated end-caps and cable compartments replace EPS styrofoam in consumer tech boxes.
Handle-slot cutouts prevent mug handles from snapping during single- and 4-pack e-commerce shipping.
Snug die-cut wells keep heavy skincare regimens facing forward when the customer lifts the mailer lid.
Choose materials, printing, and finishing options
Smooth, bright print-ready micro-flute ideal for branded DTC cosmetic and subscription mailers.
High-strength virgin and recycled brown kraft fluting for organic, plastic-free transit armor.
Thick 3.0mm flute profile engineered to suspend heavy glass jars, candles, and ceramic mugs.
Dual-flute laminated board for heavy electronics, bottled spirits, and multi-jar gift packs.
From concept to delivery in 4 simple steps
Share your requirements and get a detailed quote within 15 minutes during working hours. Our team reviews every project.
Receive a digital 3D mockup. Request unlimited revisions until you're 100% satisfied.
Your packaging enters production. Track progress through your dashboard in real-time.
Free shipping to your door. Standard delivery in 7-14 business days. Need it faster? Rush production delivers in 3-7 business days.
We offer sustainable alternatives for Corrugated Inserts that don't compromise on quality. Choose eco-friendly materials and printing options to reduce your environmental impact.
100% Recyclable
Made from recyclable materials
FSC Certified Options
Responsibly sourced materials
Soy-Based Inks
Eco-friendly printing
Carbon Neutral
Offset shipping available
Complete technical specifications for Corrugated Inserts
| Minimum Order | 250 Units (From $0.20/unit) |
| Flute Profiles | 32 ECT E-Flute (1.5mm), 32/44 ECT B-Flute (3.0mm) & 48 ECT EB Double-Wall |
| Liner Finishes | Natural Unbleached Kraft, Bleached White Clay-Coated, or 100% PCR Recycled |
| Structural Styles | Die-Cut Cradle Deck, Air-Cell Perimeter Bumper, Neck-Lock Bridge, Accordion Pad |
| Print Capabilities | Flood-Coat 1–2 PMS Flexo, Full-Bleed Digital CMYK, or Clean Unprinted |
| Storage & Assembly | Ships Flat in Strapped Bundles; Pre-Creased for 3–6 Second Hand Folding |
| Standard Turnaround | 10–14 Business Days (3–7 Day Rush Available) |
| Shipping & Guarantee | Always Free DDP Shipping + 30-Day Free Reprint & Return |
Experience the future of custom packaging with our AI-powered platform
Transform your ideas into print-ready packaging designs in minutes, not weeks. Our AI understands packaging constraints, bleed areas, and dieline requirements.
Get instant, expert recommendations tailored to your product. Our AI analyzes your requirements and suggests optimal materials, sizes, and finishes.
Real-time pricing in seconds
Start from just 250 units
7-14 day turnaround
Expert designers included
Worldwide delivery
100% satisfaction
Everything you need to know about Corrugated Inserts. Can't find the answer you're looking for? Chat with our AI consultant.
Our AI packaging consultant can answer your specific questions and help you choose the perfect configuration.
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