SET OF 2 John Deere Original Equipment Compression Spring - E77313 This fits round baler models: 435 & 535(PC2275), 540, 545 & 550(PC3179), 570, 580 & 590(European Edition)(PC3206), 572, 582 & 592(Worldwide Edition)(PC3221), 862 Premiun Round Balers(European Edition)(PC3276), 864Premiun Round Balers(European Edition)(PC3277). Specification: Wire Diameter 0.394", Outside Diameter 1.890", Free Length 32.362", Spring Rate (LBF/in or N/mm) 188.949 LBF/IN, Solid Length 22.047", Number of Coils 56, Material A15-11, Finish K. This is a genuine John Deere part. Thanks for looking!