The Microfast® HP EC/QREC Fusible Element Horizontal Sidewall High Pressure Sprinkler (K5.6) VK613 is a small thermosensitive solder link spray sprinkler available with various finishes and temperature ratings to meet design requirements. The VK613 has both standard response and quick response listings. The fusible operating element and special deflector characteristics meet the challenges of quick response extended coverage standards.