1/8ips Male Threaded Brass S Shape Arm. The Arm is Bent in a S shape from 3/8 inch Diameter Ribbed Tubing. It Measures 10 inches long (center to center) with 3/16 inch Long Threads on each end. All Lamp Arms are Hollow to Allow for the Wire to Pass Through. When used with a Armback the S shape arms ... See More