... produce many sizes envelopes in high speed and automatically. Environmental protection envelope,Kraft paper envelope Characteristics and ... paper70gsm,80gsm,100gsm,120gsm Special paperDifferent special paper will have different weightPearlescent paper120g,180g,200g, ... plus plasticHandlePP, Cotton, Silk, Polyester + cotton, twisted paper cord, nylonMethodKnot, Shoelace buckle handle rope, handle inside ...