Largest tested and listed sizes. Highest visible light transmission. Vertically-integrated, single-source, USA-manufacturer. Product innovation leader. These are just some of the reasons why SAFTI FIRST is the #1 USA-Made Fire Rated Glass, Framing, Door and Floor manufacturer and the preferred choice of architects, specifiers, contractors and building owners for over 35 years. Our products are listed and labeled by UL and/or Intertek and available with fast lead times and competitive pricing.