... : Chrome steel ,stainless steel ,bearing steel6. Vibration noisy lever :Z1, Z2,Z37. Tolerance codes :ABEC-1,ABEC-2(P0,P6)8 ... ,brassID size10-380mmQuality standardISO9001:2000PrecsionP0,P6,P5ClearanceC0,C1,C2,C3NoiseZ1,Z2,Z3VibrationV1,V2,V3HRC60-63Tolerance GradeGB/T307.1-205Delivery time7-35 ...