LIVRE 11846 Power Arm 88 + TB1 Black Limited PWA88T-SR814-BKLD for Shimano 8000-14000 Right Handle

While the M1-V knob and Bullet knob were made from aluminum alloy, the newly developed TB-1 knob uses titanium for ultimate lightness. The titanium part (excluding the bar) weighs just 37.1g. When immersed in water, it floats effortlessly.