• The size accuracy of the inner hole is 0.02mm, which fits closely with the shaft and has high concentricity
• Arc tooth runout is 0.03mm, filaments fits tight, uniform, no skid, driving force is 15Kg
• Hardened steel matrix, the overall hardness can reach HRC60+, more wear resistant
• Surface adopts the RNC nitrogen based chain nano-coating, with ultra-high hardness of HV3300
• All metal design, can print up to 500℃, compatible with a variety of models

Only include dual gear, no bearings/shafts.