The Porelon PR12 Compatible Calculator Ink Roll replaces manufactures part #s CP-12, IR-10, EA-732R, 013111. This roll provides vivid and consistent purple color in addition to exceptional light fastness and durable impressions. This product has been designed and manufactured to operate the original equipment identified. 1 pack. Porelon specializes in creating inking products and elastomers for a wide variety of industries. They focus their scientific, engineering and customer service efforts on delivering solutions that perform to your exact specifications.