Disc Spring Metric Disc Spring High Carbon Steel Finish Phosphate Min Inside Dia 0.135 in Max Outside Dia 12.8mm Thickness 0.25mm Overall Height 0.5mm Load @ Deflection (Lbs.) 29N Deflection @ Load 0.19mm Meets/Exceeds GB/T 1222-2007 ASTM-A684 Package Quantity 10