Good 4″ replacement blades
These replacement blades from Unger are designed (naturally) to fit the Unger 4-inch window scraper, and they fit it perfectly. I expect that they’ll fit virtually all 4-inch scrapers. They come in a reusable plastic container, though it is just a tad difficult to open (not a bad thing if you have children around). Each is also covered for protection and safety.
Pros: Durable, High Quality