Overview Reviews Product Description Uni-ball Gel Impact Pen 1mm 4 pack assorted. Water proof. Fade proof. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Uni-Ball Uni-ball Gel Impact 1.0mm 4pk Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments