Cello is one of the largest sellers of pens in India. The company has a highly trained and dedicated work force of 10,000. It offers a range of metal pens, gel pens and fountain pens. Cello also manufactures CD markers and highlighters. The company's Signature Series include Advance, Britec, Contra, Hormony, Striker and Writec pens. It provides sharpeners, erasers, scales, compass boxes, glue sticks and corrections pens. Additionally, the company offers various accessories, such as lead box, marker ink, refills and fountain inks.