... selfadhesive,with destructiveness for one time. post bag:courier bag, express bag,mailer bag,various with good quality and reasonable price ... one time.We mainly product PE/PO/OPP bags,self adhesive bags,envelope bags,chunk bags,air bubble bags,pearl cotton bags,vest-like bags,protective film,electrostatic film ... our products and company,please feel free to contact us. PE post /express bag