Expanding Lamp Collar, #1 to #2

This expanding collar adapts your existing lamp by threading into a standard #1 collar opening and enlarging the top to accommodate a #2 burner. Since #1 burners have become difficult to source, this adapter lets you breathe new life into vintage lamps by upgrading them with readily available #2 burner options—a practical solution for keeping cherished fixtures functional. Simply screw into a #1 collar with a 7/8" opening. Once in place and snug screw a #2 collar into top. This will work with most lamps however occasionally a vintage lamp may have threads that are slightly off making the fit difficult. Solid brass #1 to #2 expanding collar. Screws into #1 size collar and fits #2 size burners.  Inside Diameter at Top: 1-3/16" Outside Diameter of Base: 7/8"