1,Made of Brass Brass and Steel 2,size:customized 3, RoHS-approved 4,used in precision and high-end medical equipme Eccentric ... Wheel,Shaft1,precision lathing parts, RoHS-certified2,Materials,Brass(Copper ... ) and Steel,Aluminum and Steel 3,Hole tolerance: 0.01mm, offset distance: 0.02mm 4,OEM order ...