Feature: 1. Stainless steel crankset connected with aluminum alloy bracket by the rivet to reduce the heat transfer and inner stress. 2. AL7075-T6 forged bracket with great heat dispersion and antidamping property. 3. Stainless steel crankset with great desiccation tolerance and wet resistance as well as wear resistance. 4. Height difference between two side is no more than 0.3mm. 5. For mountain bike. Specification: Stainless steel crankset connected with aluminum ally bracket by the rivet prevent bending and deformation because of the uneven heating by friction. Feature: Stainless steel crankset connected with aluminum alloy bracket by the rivet to reduce the heat transfer and inner stress. AL7075-T6 forged bracket with great heat dispersion and antidamping property. Stainless steel crankset with great desiccation tolerance and wet resistance as well as wear resistance. Height difference between two side is no more than 0.3mm. For mountain bike. Specification: Material: 420 Stainless steel & 7075-T6 Model: 160mm / 180mm (optional) Color: Black / Red / Blue / Purple (optional) Thickness: 1.8-1.9mm Symmetry distance of screw hole: 44mm Weight: 105-145g / 3.7-5.1oz Package weight: 155-195g / 5.5-6.9oz Package list： 1 * Brake Disc 6 * T25 Screw Package List: 1 * Brake Disc 6 * T25 Screw