SRAM Rotor Specification:

Brand: SRAM
Color: Silver
Size :160mm/180mm/203mm. 
Weight: 160mm±113g, 180mm±144g, 203mm±177g
Hub/Brake Compatibility: 6-Bolt Disc
Pattern: Standard, 6 bolt pattern.
Centre Opposite Hole Distance: 44mm/1.7inch
Suitable for both front and rear application
Comes supplied with 6 high-quality bolts