Rubber grommets for your Myoungshin Fanta or Cool Bear lever. They can also be used in any other IST Mall manufactured levers such as the Kaze, Alpha 49s and Fujin. The rubber grommet provides allows the lever to return to neutral. The higher the stiffness, the faster the return to neutral at the cost of arm fatigue.
We stock Black 45A and Blue 35A grommets. The feel of the rubber grommet is subjective, however we would class the Black 45A as stiff and Blue 35A as medium stiffness.