This Newport 40 Mounting Rod has a Matte Chrome finish over steel and has a 1/4"-20 screw for mounting to the optical table. It is 1-1/2 inches in diameter and 14 inches tall. The Newport 40 accepts all of Newport's Rod Clamps with smooth bores, as well as the 300-P Rod platform, and 625 and 630 mirror mounts. The bottom has a 1/4-20 screw for mounting onto breadboards and optical tables. ON SALE for $45!