primary and secondary school students grade three zhengzi pen calligraphy class beginner pen replaceable ink sac ink dual-use pen

macaron white macaron pink macaron black macaron red macaron yellow macaron blue macaron green macaron light blue macaron light green macaron purple pink-green gradient color powder blue gradient color yellow and blue gradient color green-to-white gradient green-yellow gradient color transparent cap of a pen-white transparent cap of a pen-pink transparent cap of a pen-red transparent cap of a pen-yellow transparent cap of a pen-blue transparent cap of a pen-green transparent cap of a pen-light green transparent cap of a pen – azure green morandi pink morandi black morandi red morandi yellow morandi blue morandi green morandi deep green aurora white aurora pink aurora red aurora gold aurora blue aurora silver transparent white transparent black transparent red transparent blue transparent green white-to-blue gradient with a skin-like texture pink and yellow skin-toned gradient color powder blue to skin tone gradient yellow and pink skin-tone gradient qinglan skin-feel gradient color purple-pink gradient with a velvety texture black ink sac 10 pieces per pack

0.38mm 0.5mm