Light weight extension for mounting on VAST adapter plates. Adjusts to any radial angle. Made of Therm-X carbon fiber tubing with machined titanium end fittings. There are five M5 tapped holes in the cube. L1 = 141.50 mm, L2 = 100.0 mm. Weight is 54.40 grams. Compare to Zeiss 626107-2100-130.