"Package of Two" Smith Corona CXL-4200, CXL-4210, CXL-4300, CXL-4310, CXL-4700, CXL-5100 and CXL-5200 Typewriter Ribbon, Correctable, Compatible - by FJA Products 2 Pack New Black Correctable Film Ribbon Cassettes FJA Products brand Replacement For Smith Corona brand Cost Savings Alternate To OEM Replaces SMC21000 - 63446 and "H" series