This is a A-4976-005-01 Spring PN: 4976-005-01Main Description As Following : A-4976-005-01 Spring P.N: 4976-005-01 New heavy disc mower spring. Spring has 4.725" O.D. and 2.88" I.D. Fits Vermeer disc mowers. Stocked As: A-80A80 Found in Section & Models : Hay Tool Parts > Slip Clutch Parts, Vermeer MOWER, DISC: SEVERAL Associated Items : New Also This is An Aftermarket Product And : New heavy disc mower spring. Spring has 4.725" O.D. and 2.88" I.D. Fits Vermeer disc mowers. Inside Diameter: 2.88" Outside Diameter: 4.725"