Viking Standard/Quick Response Concealed Pendent Sprinkler VK352 is a thermosensitive glass bulb spray sprinkler pre-assembled with a threaded adapter for installation with a domed cover that provides up to ½” (13 mm) of vertical adjustment. The cover plate is available with several decorative finishes to meet design requirements. The Electroless Nickel PTFE (ENT) finish has been investigated for installation in corrosive environments and is listed/approved as indicated in the Approval Charts. The ENT finish is only available for the sprinkler assembly, the cover plate is not plated.