Pentel HyperG Retractable Gel Roller Pen, 0.7mm, Permanent Assorted Ink, 4 Pack (KL257CRBP4M1) Low viscosity ink is Triple Safe: People Safe, Check Safe, Earth Safe Diamond-cut barrel design with silver accents Made of 57% recycled plastic and refillable with Pentel KLR5 refills Durable, metal tip writes 0.7mm medium lines Pack includes 4 pens in the following color mix: Green, Orange, Pink and Sky Blue