This is the big boy, the GT2 80T pulley with grub screws

Please note, over time he design of the neck piece with the grub screw has changed, this does not impact installation, use or anything other than a cosmetic change that is invisible to the user.

Silver pulleys may have scuffs or scratches on the external features due to being shipped to use in bulk. Like the design elements, this does no impact form or function and should be nearly invisible to the user.