[SPECIFICATIONS] Length of 4 inches/10cm. Net Weight: only 25g/pcs. Material(s): Aluminum Alloy. [15MM RODS] Come with 2 pcs industrial 15mm standard rods. [COMPATIBILITY] Mainly used on camera riser system and filmmaking accessories, such as matte box, follow focus, lens support, etc. [INNER THREAD] M12 inner thread on each end of the rod, so that you can use M12 threaded connector to lengthen the rod, or use M12 rod end cap to prevent your accessories sliding from rods. [HIGH QUALITY] Made of 6061 aluminum alloy, well finished and precise CNC processing, sturdy and durable. If you need a higher carrying capacity rod, we have Stainless Steel Rod 3684, 3682, and 3683 as a recommendation.