The SP6NXCTUL is a NEXUS UL contractor series 6.5” 70V commercial metal back can speaker. Heavy-duty, industrial metal back cans that provide component protection and safety while enhancing the speakers full-range bass sound. Removable Quick-Snap connection terminals provide easy access and optimal angles for connecting speaker wire. Wattage selector dial simplifies transformer settings. Mounted security loops allow for support cable run and drop ceiling support brackets are included. The 5.25" model has met strict UL1480 requirements, while the 6.5" model has met both UL1480 and UL2043.