Material: Aluminum Alloy Teeth: 32 T (40g) 34 T (42g) 36 T (55g) 38 T (75g) 40 T Material: Aluminum Alloy Color: Black red gold silver blue Process: CNC Treatments: Polished, Anodizing Sample order: Yes Compatible with: 9, 10, 11 Speed Chains and 104 BCD cranks