The Round stem is the latest Megatech product. Besides the bolts it consists of 3 parts: the hollow body, front cup and press spacer in the middle. The guys said they played around with different shapes and came up with that round design in the end. It's available in 4 different colors: black, purple, red and Blue and weighs 186gram = 0.41lbs. The reach is 30.5 mm and you get a 5month warrenty. 

More photos: Megatech - Round Stem