50 PCS 8.5×11 Inch White Corrugated Cardboard Sheets Filler Insert Pad DIY
White surface and brown inner. Only 1.5 mm thick but sturdy, reducing transportation costs. Bulk Flat Insert Sheets Materail: Crush Proof Corrugated Cardboard (E-Flute). Craft Cardboard Sheets. Material: Premium cardboard layer pads.