AROSPEED Harden Lightening Crankshaft Pulley is different with others Aluminium crank pulley.
It is using 6061 Aluminium and over-coating a harden layer.
This harden effect will protect the pulley and become wear-resisting.
The latest technology that we can let the harden effect to become coloured.
NEW Diamond coat will last longer than Golden Harden more then 30%.