uni-ballpoint signo gel rt retractable roller ball pen, blue ink, medium 0.7 mm, refillable combines the performance of a ballpoint with the glide of a roller ball for a superb writing experience. The acid-free gel ink is perfect for those important documents that need to withstand the test of time. Rectractable point protects the pen tip as well pen type: roller ball; special ink type: gel; pen style: rectractable; ink color(s): blue. this product arrives to most customers in 2-3 business days.