6 reviews of Pentel of America "I LOVE Pentel pens! My favorite is the Pentel R.S.V.P. Medium Line, BK91-C Blue as it's such a classic ball point that never become outdated. The round rubber grip is an easy catch with slippery fingers without writer's cramp developed for students and prolific poets like myself due to its very smart ergonomic rubber barrel design of latex-free ...