Disc Spring,Split Wave Springs,High Carbon Steel,Finish Plain,Min. Inside Dia. 0.093 In.,Max. Outside Dia. 390.0mm,Thickness 1.07mm,Overall Height 4.0mm,For Rod Size 5/16 In.,Load @ Deflection (Lbs.) NA,Deflection @ Load 9.14mm,Meets/Exceeds SWRH72A, GB4357-B,Package Quantity 10