Come and see our amazing products. The 0.5 mm refill is a spring-retractable design that can be quickly interchanged on a pen with a gentle press, and the tip provides a thick, solid line that is not too thick.various colors are good for highlighting or color-coding key points in text or in doing notes. The pen comes with 6 colors, from black, red, blue, to green, orange and purple inks, you can quickly switch between different colors with a light press, fun and practical all in one. Pls confirm with us about the packing info, stock color and exact production time before placing your order.