4.7mm (aprox. 3/16") thick 6061 aluminum gauge mount.  Unpainted.
 
We have created mounts for: 
Honda CB450
Honda CB360
Honda CB750
Yamaha XS650
Yamaha XS500
Yamaha XS400
BMW r65
Kawasaki KZ440
Kawasaki KZ400
 
Options: 
- Gauge diameter 86mm (3-3/8") and mounting holes
- Gauge diameter 64mm (2-1/2") and mounting holes
- Gauge diameter 52mm (2") and mounting holes
 
Contact us and send your gauge diameter dimensions, if you need lights (LED), and mouting holes (prefer dims, but make/model works with year) +$30 for custom bracket or order one listed above and make it work!