The Cello Signature Carbon Ball Pen & refill pack is meant for an ultra-smooth writing experience. This metal Cello pen is a stylish companion with its classy all-black look and matte finish. The ball pen has a twist mechanism that works with a single twist to enable easy use. This premium Cello pen is a perfect pen gift for Valentine's day. Its a ball pen that features a 0.7 mm fine tip for fine writing. This pack consists of a blue ball pen that comes along with a refill, making it an ideal gifting writing pen for him and for her.