Overview Reviews Product Description The Uni-Ball Eye Rollerball Pen contains a unique system for optimal continuous flow and high writing performance. Plus it features a clear ink chamber so you can monitor how much ink is left. 0.38mm nib. Permanent, waterproof and fade proof once dry Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Uni-Ball UniEye UltraMicro 0.38mm 4pkAs Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments