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普通圆珠笔芯,笔珠分0.38,0.5,0.7,1.0MM,笔头有环保和不环保笔头,规格分:直径1.0MM,长7.5mm;直径2.2mm,长7.5mm;直径2.3mm,长8.8;油管直径2.8-3.1MM,PP油管长度:23-137mm.油墨分国产和德国进口,油墨的颜色以黑色,蓝色,红色为主,其它彩色可以定做,但有量的限制.笔头和笔珠,PP油管,油墨都有相关的测试报告,能达到出口的要求.圆珠笔笔芯,书写流畅. 规格多做多样.油墨颜色可根据客户要求定做