1.Multi-layer,co-extrude film! 2.Sticky glue can destroy the bags,it is safe! 3.Brand-New PE material! Poly mailers/express bags/mailing bags/express envelope/plastic envelopes/Poly bags/mailers1.Introduction: a tough 65 micron poly mailert with 50mm or 2 inches self seal flap;2.Dimensions: 10"X13" inch =WX(L+Flap):254X(330+50)mm3.Colour: Matt white outside and grey inside;4.Material: Brand-New ...