20pcs Heavy Duty 135 x 135 x 180mm Brown Double Wall Mailing Box

Our robust double-walled brown regular slotted mailing boxes are the ideal solution for shipping heavy-duty items, valuables, and even highly fragile pieces. With 20 pieces per pack in a standard 135 x 135 x 180mm size, these cost-effective, sturdy boxes provide the additional support needed to mail even heavy items safely.