The price is primarily driven by the material grade (flute type) and paper weight (GSM). For standard protection, B-flute (3mm) or C-flute (4mm) are cost-effective, while E-flute is better for delicate retail packaging. Ensure the supplier specifies the bursting strength (ECT - Edge Crush Test); a higher ECT rating (e.g., 32 ECT or 44 ECT) increases price but prevents product damage during transit. Additionally, verify if the dividers are die-cut for precision or slotted, as die-cutting offers better structural integrity for high-speed automated packing lines.