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[black] high temperature vanishing pen refill [beige] high temperature vanishing pen refill [blue] high temperature vanishing pen refill [red] high temperature vanishing pen refill [pure white] high temperature vanishing pen refill mercury refill [blue] low temperature does not reverse color, only thick pen [white] low temperature does not reverse color, only thick pen

thick pen-100 pcs/bag thin rod-100 pcs/bag