Billet 6061 T-6 Aluminum.
Replaceable bearing and snap ring.
Same high spec bearing as GM LS3. (12x17x40mm)
Front and belt surface polished.
Comes with snap ring and bearing installed.
Pulley is Made in the USA.
Fits 6-ribbed serpentine belts
Diameter 3.0" ,Width 1 5/16"