This is a CUSTOMER RETURNED chrome aluminum smooth top master cylinder. 

 ***CUSTOMER ORDERED WRONG AND RETURNED.  PACKAGING HAS BEEN OPENED AND CHROME FINISH IS NOT PERFECT, BUT NEVER INSTALLED OR USED AND STILL NICE FOR DAILY DRIVER...SAVE $$$

This master cylinder features a very nice smooth chrome top & 1 1/8" Bore. This works great for most drum/drum, disc/disc or disc/drum applications.  This is a four port master cylinder, so you can use the ports on which side you need and block the others.  This is a great upgrade over a stander GM style master.  Mounting hole measurement is 3 3/8" center to center. This bore size is mostly used for Disc Disc operation but works perfect with drums also.