factory express envelope wholesale free shipping medium waterproof thickened customized black self-sealing large bag small size packing bag

black thin-semi-new material-cost-effective black thick-semi-new material-safety seal

15*25 [buy 100 and get 200 for free, 300 in total]] 17*30 [buy 100 and get 200 for free, 300 in total]] 20*30 [buy 100 and get 100 for free, 200 in total]] 25*35 [buy 100 and get 100 for free, 200 in total]] 20*35 [buy 100 and get 100 for free, 200 in total]] 28*42 [1 bundle/100] not cost-effective 28*42 [buy 100 and get 100 for free, 200 in total]] 30*42 [1 bundle/100] not cost-effective 30*42 [buy 100 and get 100 for free, 200 in total]] 32*45 [1 bundle/100]] 35*45 [1 bundle/100]] 38*48 [1 bundle/100]] 38*52 [1 bundle/100]] 40*52 [1 bundle/100]] 42*52 [1 bundle/100]] 40*55 [1 bundle/100]] 45*55 [1 bundle/100]] 40*60 [1 bundle/100]] 45*60 [1 bundle/100]] 45*65 [1 bundle/100]] 50*60 [1 bundle/100]] 50*70 [1 bundle/100]] 60*70 [1 bundle/100]] 50*80 [1 bundle/100]] 60*80 [1 bundle/100]] 17*30 [1 bundle/100] not cost-effective 20*30 [1 bundle/100 pcs] not cost-effective 25*35 [1 bundle/100] not cost-effective 20*35 [1 bundle/100 pcs] not cost-effective