This is a card (a group of three)

Type | three fold card double-sided printing Paper | two-color kraft paper (red cow. White cattle) Thickness | 250P Size | 19x33.6cm (expand), 19x12cm (after three fold) Manufacturing | Taiwan **Steps for usage** *Write down* https://farm5.staticflickr.com/4444/38080837871_b092d1dcbf_k.jpg *2. fold by fold line* https://farm5.staticflickr.com/4499/38027987876_fe0cd35a50_k.jpg *3. Bonding opening, write the name of the address (posted stamp)* https://farm5.staticflickr.com/4478/38027987566_3b90869659_k.jpg