White C6/A6  boxes are available with a locking mechanism.

White outside and Brown inside

Large letter qualifying

Made from a hard 1.2mm Thick single wall cardboard

A6/C6: EXTERNAL SIZE: 160mm x 115mm x 22mm (6.3" x 4.5" x 0.8") - LARGE LETTER QUALIFYING (WEIGHT: 26.5g)

MADE FROM A HARD 1.2mm THICK SINGLE WALL CARDBOARD