Duotone Silver Series Mega.SlimWith a tube diameter of 25. 5mm (140 + 160 length) its just 0. 5mm bigger than even the thinnest carbon booms out there (with the exception of our own PLATINUM booms : ) Unbelievable but true, the SILVER MEGA SLIM is also as stiff as most carbon booms out there. We achieve this new stiffness level by combining the stiffest 7075 alloy available which can only be bent using our PARTIAL SUBSEQUENT HEATING PROCESS with our unique OVAL TAIL SECTION and