Bearings
Stainless steel SUS440.
ABEC-3 dimensional accuracy.
Stainless steel SUS304 steel cage.
Internal synergistic grease, smooth rotation and no stalling.
V-groove structure of the inner ring for good dust and dirt resistance.
Special Note: Please use a professional Perrin dismantling tool to install and dismantle the Perrin to avoid damage to the bearing.