The WindStrong Series 5680 is MGM's premier Impact Rated New Construction PVC Vinyl Single Hung Window. It looks the same as the 5610 Single Hung Window, but has been upgraded with engineered structural improvements and impact rated laminated glass that allows it to hold up to high wind loads and withstand direct impacts. The 5680 has been tested at MGM's test facility and retested at a third party testing facility. The 5680 should be a good choice for customers who would like extra strength and security and laminated impact rated glass.