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1/8 IP x 3/16", Both Ends Threaded, Fixture Stem - Lamp Pipe, Your Choice of Lengths from 1-1/2" to 36" (1/8 IP = 3/8" diameter) (22249BU) - Antique Lamp Supply - Quality Lamp Parts Since 1952
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Round Brass Tube Copper Pipe OD 2/3/6~20mm For Pipeline Model Making Engineering | eBay