PM Company Preventa Four-Color Multifunction Pen with Agion, Medium Point, Blue Translucent Barrel, Red/Blue/Black/Green Ink, 12 Pens per Pack (05085) Blue translucent barrel Agion antimicrobial technology built in to protect the pen With Zeomic Type AJ Silver Zeolite A suppresses the growth of algae, mold, mildew, fungi and bacteria Four ink colors-black, blue, red, green Blue translucent barrel Agion antimicrobial technology built in to protect the pen With Zeomic Type AJ Silver Zeolite A suppresses the growth of algae, mold, mildew, fungi and bacteria Four ink colors-black, blue, red, green 12 Pens per Pack