The mark consists of two parallel cylindrical bars of equal height and width lying at a 50 degree angle and right slope. The width of the parallel bars is 12.5% their length. The bars are rounded or tapered at both ends. The space between the bars is 60% of the bars with at its narrowest, and 100% of the bars with at its widest. The parallel bars are intersected by a third bar. The third bar is also rounded or tapered and the same width as the parallel bars. The third bar is 82.5% the length of the parallel bars. The third bars lies at a 40 degree angle and left slope. The point at which the third bar intersects with the left parallel bar is 23% from the bottom of the bar. The point at which the third bars intersects with the right parallel bar is 38.5% from the bottom of the bar. The widest point of all three bars is at their intersection point, and the narrowest space between the parallel bars is at the point at with they intersect with the third bar.