1. 11/12/13S mountain bike mid-pass crankset 2. The crankset is made of OFFSET-3MM iron-coated plastic, with beautiful appearance, and the crank AL-6061-T6 has good strength. 3. The mid-pass crankset is lightweight and easier to ride. Easy to step on, not easy to fall off 5. CL: 49.5mm 6. Q-FACTOR: 178mm 7. Chain line: 50mm 8. B.B.Axle: 2495mm We apologize for the inconvenience, but at the moment, we do not offer sales of this product to individual consumers. However, we do have options for B2B sales and would be happy to assist you through our offline business team. You can reach them at sales@wheeltop.com for further information.