Carbon Black, PE, PP manufacturer / supplier in China, offering Customized Laser Printed Engineering Single-Sided Blue 24 Inch Blue Drawing Size Engineering Paper, 80GSM Double-Sided Blue Print Paper, for CAD Drawings 20 "X 50" 2" Core, Plotter Computer-Aided Design Engineering Drawing Blue Print Roll and Paper Inkjet Printer 3 Inch/2 Inch Core Drawing Paper Custom Size and so on.