Viking Standard/Quick Response Extended Coverage Light Hazard Extra-Large Orifice (ECLH-ELO/QRECLH-ELO) Pendent Sprinkler VK608 is a thermosensitive spray sprinkler available in several different finishes and temperature ratings to meet varying design requirements. The sprinkler has both quick response and standard response listings as indicated in the Approval Chart on the Technical Datasheet.