The Ergo Sof PenAgain features a patented, ergonomic design that adapts to the contours of the user's hand. This adapted writing pen helps to alleviate stresses normally experienced with a standard writing pen. The Ergo Sof PenAgain allows the natural weight of the writer's hand to provide sufficient pressure to apply ink to the paper. The shape of the pen eliminates the need for the user to grip the pen and allows the thumb and forefinger to serve merely as guides. The Ergo Sof PenAgain helps alleviate the symptoms of Writer's Cramp, Carpal Tunnel Syndrome, calluses, and repetitive stress injuries. The Ergo Sof PenAgain is blue and includes 2 black ink refills. The Ergo-Sof PenAgain Refills are a package of 2 black ink refills for the Ergo-Sof PenAgain. Slide the tip off of the Ergo Sof PenAgain to insert the ink refill. Sold separately. Ergo Sof PenAgain Specifications: Pen Color: Blue. Ink Color: Black. Measures: 4 inches long, 1-3/4 inches wide overall. Item weight: 0.5 ounces. Choose: Ergo Sof PenAgain or PenAgain Refills.