The nylon typewriter ribbon is coiled around two spools, ready to be fitted on your typewriter. Replacement for GR4 universal twin spool typewriter ribbon, unique printing and dyeing technology to provide consistent, clear, and excellent printing without fading. Premium features: compatible universal twin spool typewriter ribbon utilizes ultrasonic welding technology to splice the ribbon, making the universal calculator ribbon smooth and seamless, avoiding damage to the printer due to rough interface. Various occasions: compatible GR4 universal twin spool printer ribbon can be used for office, family, or other business situations. It is ideal for providing accurate printing results for your projects and daily printing needs. Model compatibility: bigger typewriter spool ribbon is suitable for most typewriters. Please confirm the model of your printer and ribbons. Ribbon ink color: Black & Red / Black Easy to install, remove, and replace For use on Olivetti GR4 typewriter Material: ABS + nylon Package contents: 4 x typewriter ribbon / 1 x typewriter ribbon Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. The measurement allowed error is +/- 1-3 cm.