Jandorf
LIGHT FIXT CROSSBAR ADJ 3-7/8IN TO 5IN
JANDORF SPECIALTY HARDWARE
3-7/8" To 5", Adjustable, Slips 3/8 IP, All Purpose, Zinc Crossbar, Use For Mounting Light Fixtures To 3", 3-1/4" Or 4" Electrical Boxes, Includes 2 Each Of The Following: 1/2" Mounting Screws & 3/4" Mounting Screws.