Disc Spring Metric Disc Spring High Carbon Steel Finish Phosphate Min Inside Dia 40.5mm Max Outside Dia 54.5mm Thickness 0.60mm Overall Height 1.5mm Load @ Deflection (Lbs.) 140N Deflection @ Load 0.67mm Meets/Exceeds GB/T 1222-2007 ASTM-A684 Package Quantity 10