This is a bit from the Reining Collection that has an aluminum finish. The cheek piece is a 7 ¼ inch medium shank that is engraved. The mouthpiece is a curved correctional with sweet iron and copper.  This has a 5" mouth.

Metalab

Smooth

Aluminum

Correction Bit

7 1/4 Shank 

5" MP

Sweet Iron

Curved 

Copper Covered 

Medium Port (1 5/8" Wide, 2" Tall)