... 1, ISO9001,2000 certification 2, Top quality,stable performance,suitable price 3, Non leakage ,smooth writing 4, OEM offered MaterialCanbonModel numberWB37011TypeTwistStyleBP&RPInk ... ,Mass producing capability.3,Comprehensive QC system ensures good quality with competitive price.4,35days delivery periods guarantee safe ... R&D team, meet the customer's latest demand. High quality Carbon fiber metal pen