This document contains technical drawings and specifications for a rail system brake assembly. It includes dimensions and details for an upper wheel brake with a flat ring profile measuring 40x20x2 mm. It also shows a side view of the rail system with dimensions for components like the profile, which measures 50x25x2.5 mm. The document was created by Mark S. and Y.G. and is printed on an A3 sheet at a scale of 1:20.