Viking Standard/QREC Light Hazard ELO Fusible Element Pendent Sprinkler VK617 is a thermosensitive spray sprinkler available in several different finishes and temperature ratings to meet varying design requirements. The fusible operating element and special deflector characteristics meet the challenges of quick response extended coverage standards. The sprinkler has both quick response and standard response listings as indicated in the Approval Charts. The special Polyester and Electroless Nickel PTFE coatings can be used in decorative applications where colors are desired. In addition, the ENT coating has been investigated for installation in corrosive environments and is listed/approved as indicated in the Approval Charts