Usage Tips:The nylon typewriter ribbon is coiled around two spools, ready to be fitted on your Typewriter Replacement for GR4 universal twin spool typewriter ribbon adopt unique printing and dyeing technology to provide you with consistent, clear, and excellent printing without fading. Premium Features: compatible universal twin spool typewriter ribbon utilize ultrasonic welding technology to splice the ribbon, which makes 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 perfect to provide accurate printing results for your project and daily printing. 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, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.