Add a touch of personal expression to your work with uni-ball Vision Elite BLX Infusion rollerball pens.The unique BLX Infusion series features black ink with a hint of colour.Perfect for business travellers, Vision Elite roller pens also have a unique leak-free design that's not affected by changes in a plane's cabin pressure.uni-ball Vision Elite pens feature uni Super Ink which helps protect against water, fading and fraud.The specially formulated pigment based ink contains particles that form an indelible bond in paper- it can't be broken.ever.Experience colour like never before with uni-ball Vision Elite BLX Infusion rollerball pens.