Six inch plastic razor blades. Designed and built to fit Triumph, Unger and Ettore professional window scrapers. Replaces the blade cartridge and turns your scraper into a plastic razor scraper suitable for scraping windows, floors, or anything that can use a wide 6 inch plastic blade. 6 Pack blades have natural lubricity, high rigidity and mechanical strength. Long term fatigue resistance when used in repeated impact and are highly resistant to moisture.