Jandorf
8", 1/8 ip, zinc plated, lamp nipple, use in repairing or making lighting fixtures & lamps, can also be cut to size or connected with a coupling or reducer to adjust the length.
Cooper Lighting Halo HLBSL609FS5 Round 6" Slim c-Canless LED Downlights
Leviton 004-3152-8 Porcelain Keyless Screw Terminal Lampholder ~ 660w
Leviton 003-124-D Pigtail Type Incandescent Lampholder
Leviton 019-8101 Lamp Holder, Porcelain
Cooper Lighting HALO SMD6 LED 6" Round/Square Surface-Mount Downlights