Pentel R.S.V.P. medium-point black ballpoint pens contain a sturdy, well-balanced barrel for comfort as you write. The stainless steel tip provides a precise amount of ink for easy-to-see lines on the page. Meanwhile, the clear barrel allows you to see how much ink is left so you can have refill ink on hand, and there is enough ink to write nearly one mile on a single ink reservoir. The ergonomic design helps reduce fatigue on your hand as you write for long periods of time.