Compatible with 1947-1969 Chevrolet/GMC Truck, Blazer & Suburban

This is the round 5-inch mirror head with ribs on the back. This means the back of the mirror has a pattern of concentric rings on it. Made of chromed steel and mounts to the arm with a 1/4-inch stud. Complete with lock washer and acorn style nut. Use with factory style mirror arms (sold separately).