Satco Item 90-463, 3 Light Cluster Socket 1 3/4'' 1/8 IP Threaded Bottom Bracket with 5/8'' Nipple Bracket: 1 3/4'' 1/8 IP Threaded Top Bracket with 5/8'' Nipple 8'' Black/White Wire Leads Rated 105c Up to 660 Watts / 250 Volts UL Classification: cULus - Listed