They are constructed of thick gauge aluminum and with a high quality Satin Aluminum finish. This kit also includes a Brand New Aluminum Machined power steering pump pulley. This is a single groove pulley. This fits all GM key-way power steering units through 1984 with a 5/8 Shaft. Will NOT fit press-on power steering pumps.
Finally this kit also includes the aluminum alternator pulley with aluminum fan. This set is designed for most original GM alternators as well as aftermarket 1 or 3 wire alternators.
The pulley diameter is 2 13/16 and comes complete with a dress up nose cover. A nice finishing touch to upgrade an old or new alternator. 5- Double Groove Water Pump Pulley (with bolts). Single Groove Aluminum Alternator Pulley With Nut Cover.
Single Groove Saginaw "Key Way" Style Power Steering Pulley. Professional Installation is Highly Recommended.