The Reliable Model G4A Concealed Automatic Sprinkler is designed for use where aesthetic appearance is important. This sprinkler is FM approved as a standard response concealed sprinkler and also has a UL listing as a quick response concealed sprinkler. It uses a fast response fusible element in a standard style sprinkler frame with a drop-down deflector. See Technical Data Sheet for further information or click here to view cover plates available for this model (sold seperately). Also available is a sealing cover plate designed for use in sensitive areas where it necessary to prevent air and dust travel from the ceiling area above the cover plate - click here for details.