These Blue and Red Ink Rollers are guaranteed to have a shelf life of nine months. The Blue and Red Ink Rollers are both perfect for making colorful art prints or colorful flyers to advertise a party. Like just about every other Martin Yale ink rollers, the blue and red ones guarantee amazing and clean results. Martin Yale ink rollers are very high-class and high-performing rollers and the Blue and Red rollers are no exception. The ink flows very smoothly so your prints should come out without any messiness. These quality ink rollers ensure that smooth touch.