Rigid environmental easy-opened mail bags Specifications: 1) fully laminated, the mailer provides outstanding stiffness and puncture Resistance 2) lightweight for postal savings 3) standard cohesive self-seal closure is secure and speeds up packaging Process 4) easily accepts stamps, labels or written address 5) high-slip inner surface for easy product insertion 6) easy-open tear strip allows quick access; this special design has been Registered with national patent 7) made from recycled materials, can be reused Size: (can be custom-made)(w x l) S1: 215 x 280 + 30mmflap S2: 240 x 340 + 30mmflap S3: 265 x 380 + 30mmflap S4: 300 x 405 + 30mmflap S5: 360 x 480 + 30mmflap Outer package:carton