The UB-150 Eye broad rollerball has a 1.0mm nib and offers precision whilst also producing a smooth and broad line, perfect for everyday use in offices, homes and schools.This pack of 3 uni-balls have vivid blue pigment ink that will not run even when water is spilt, the nib is stainless steel making it durable and able to withstand pressure. This pack is made up of plastic free packaging making it an environmentally friendly choice to plastic.. Pack of 3. 1.0mm nib. Plastic free packaging. Clear vivid ink producing strong broad lines. Water-based pigment ink that does not run. Approximate dimensions (mm) H 179 W 80 D 20