black gel pen student only ins good-looking blue red water-based refill 0.5 bullet full needle tube carbon pen

syringe head (black 0.5mm)(针管头（黑色0.5mm）) bullet (black 0.5mm)(子弹头（黑色0.5mm）)

50 pens + free (100 refills)(50只笔＋送（100只笔芯）) 30 pens + free (100 refills)(30只笔＋送（100只笔芯）) 20 pens + free (100 refills)(20只笔＋送（100只笔芯）) 10 pens + free (100 refills)(10只笔＋送（100只笔芯）) 30 pens + free (50 refills)(30只笔＋送（50只笔芯）) 5 pens + free (50 refills)(5只笔＋送（50只笔芯）) 20 pens + free (50 refills)(20只笔＋送（50只笔芯）) 5 pens + free (20 refills)(5只笔＋送（20只笔芯）) 10 pens + free (50 refills)(10只笔＋送（50只笔芯）) 1 pen + free (5 refills)(1只笔＋送（5只笔芯）) 10 black pens(10只黑笔) 20 black pens(20只黑笔) 30 black pens(30只黑笔) 50 black pens(50只黑笔) 100 black pens(100只黑笔) 100 refills(100只笔芯) 1 refill(1只笔芯) 50 black pens + free (50 red refill)(50只黑笔＋送（50只红笔芯）) 50 black pens + free (50 blue refill)(50只黑笔＋送（50只蓝笔芯）) 50 black pens + free (25 red 25 blue refill)(50只黑笔＋送（25红25蓝笔芯）) 100 black pens + free (20 red refill)(100支黑笔＋送（20只红笔芯）) 100 black pens + free (20 blue refill)(100只黑笔＋送（20只蓝笔芯）) 100 black pens + free (10 red 10 blue refill)(100只黑笔＋送（10红10蓝笔芯）)