Specifications include, but are not limited to: The work to be performed under this contract includes, but is not limited to removal and replacement of select exterior doors, frames, and hardware at Barnstable United Elementary, West Villages Elementary, Centerville Elementary, Hyannis West Elementary, Barnstable Community Innovation School and West Barnstable Elementary. Work includes the creation of secure vestibules via security control hardware. Alternate Number One (#1): All work associated with Centerville Elementary School Located at 658 Bay Lane, Centerville, MA 02632; Including but not limited to removing existing exterior hollow metal and aluminum storefront doors and/or frames, providing new hollow metal or aluminum storefront entrances, and all associated door hardware, Secure Vestibules, electrical, low-voltage, and security components at Centerville Elementary. Alternate Number Two (#2): All work associated with West Hyannis Elementary School Located at 549 West Main St, Hyannis, MA 02601; Including but not limited to removing existing exterior hollow metal and aluminum storefront doors and/or frames, providing new hollow metal or aluminum storefront entrances, and all associated door hardware, Secure Vestibules, electrical, low-voltage, and security components at West Hyannis Elementary. Alternate Number Three (#3): All work associated with Barnstable West Elementary School Located at2463 Main Street, West Barnstable, MA 02668; Including but not limited to removing existing exterior hollow metal and aluminum storefront doors and/or frames, providing new hollow metal or aluminum storefront entrances, and all associated door hardware, Secure Vestibules, electrical, low-voltage, and security components at Barnstable West Elementary.