... #, 65Mn,Q195, Q215, Q235, Q345 2) Color: black, bright, blue and yellow. 3) Size: 0.3-2.3mmx40-230mm Detailed Product Description ... : 50#, 65Mn, Q195, Q215, Q235, Q3452) Color: black, bright, blue and yellow.3) Specification: thickness: 0.3-2.3mm width: 40-230mm4 ... ) Usage: These products are widely used in tools and hardware, final shutter spring (round edge), reeling shutter spring steel ...