... material 2.B4 size 3.OEM is accepted US-P57 Transparent PP zipper bag,file bag,pp document bag US-P57 ... Transparent PP zipper bag • Transparent PP document bag, pp zipper, enviromental protective material ... : B4, there are also A5, B5, A4 sizes for choosing• Color: transparent, red, yellow, blue, green• Thickness: 0.15mm• Packing: 24pcs/pp ...