InfinityMice Infinity Hump ProV2 Black S Size Shape matters. You shouldn't have to compromise with a shape that doesn't hit the mark. This replaces the current backshell of the Starlight 12 with a hump designed for claw grippers. The all-new ProV2 series is forged from magnesium, bringing back the original Starlight feel to the mouse. Features: Claw-oriented shape Magnesium alloy 4g-5g (0.5-1g stock difference) Thickness: 0.7mm This is a shell for the Finalmouse Starlight, but it can also be installed on the Finalmouse UltralightX Cheetah. Cards are not included.