These are cheaper non-hardened shims. They are an alternative to use in between two hardened JD exclusive shims. We carry these as the price for a JD hardened shim has increased exponentially in the last couple years to over $0.31. Sometimes you need hundreds of these to shim out new gauge wheel tires and the implements usually do not have them on-hand. These shims can deform under heavy angled pressure but work just fine when between two hardened shims that apply equal pressure, and they are a third of the price. Much better to use these than random washers laying around the farm if hardened shims are not available. For all John Deere air seeders and box drills in the 95, 90, 60 and 50 series.