Northstar Water Pump Socket by Astro Pneumatic. Used to remove and install the water pump on Cadillac Northstar 4.6 liter V-8 engines 1993 and later and Oldsmobile Aurora 4.0 liter V-8 engines 1997 and later. Drive end size: 1/2" drive, socket end size: 1/2", length: 2-5/16" and 6 points. U.S. shipping $6.00, Canada $13.00, and Worldwide $16.95. We also ahip APO, FPO and do combine shipping. As always we appreciate your business with us. Check out my other items! Sign up for my email newsletters by adding my eCRATER Store to your Favorites. Froo www.froo.com | Froo Cross Sell, Free Cross Sell, Cross promote, eCRATER Marketing, eCRATER listing Apps, eCRATER Apps, eCRATER Application Froo www.froo.com | Froo Cross Sell, Free Cross Sell, Cross promote, eCRATER Marketing, eCRATER listing Apps, eCRATER Apps, eCRATER Application