Specification Brand : USA Knifemaker Supply BulletPoint1 : These small roller wheels fit into the Beaumont Metals Small Wheel Attachment. Note: all wheels are shown for size purposes. You are purchasing 1 wheel. BulletPoint2 : I had these custom made for us. You won't find these anywhere els BulletPoint3 : These are 70 duro polyurethane small contact wheels that will fit into the small wheel attachment we sell seperately. These wheels will cost you approximately 1/3 less than the vulcanized rubber small roller wheels we also sell. BulletPoint4 : OAL is 3.125" BulletPoint5 : Note: all wheels are shown for size purposes. You are purchasing 1 wheel. Color : Black ConstructionType : Coated ExteriorFinish : Polished ExternallyAssignedProductIdentifier : 00818070020503 ExternallyAssignedProductIdentifier1 : 0616639510454 ExternallyAssignedProductIdentifier2 : 616639510454 IncludedComponents : Dynabrade Branded Product ItemDisplayWeight : 34.1 grams ItemName : Poly Small Wheel Rollers for 2x72 Grinders (.75" Diameter) ItemPackageDimensions_Height : 4 inches ItemPackageDimensions_Length : 24 inches ItemPackageDimensions_Width : 4 inches ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : drive-rollers LoadCapacity : 1200 pounds Manufacturer : USA Knifemaker Material : Metal Material1 : Rubber Material2 : Polyurethane ModelName : Casters ModelNumber : Newnew NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : W-620-D-3-4 PowerSourceType : ac_dc ProductDescription : What's the difference between the two: The higher priced ones are made using time proven vulcanized rubber to 70 duro. These wheels were made with 70 duro hardness polyurethane. If I gave one each of them to you I'm fairly certain you would not be able to tell the difference. In use, polyurethane will start to melt around 185F degrees. If you run them that hot, you'll have problems with the bearings (on both the rubber and poly wheels) also. Keep the temp down and these will work just fine and you'll save 1/3 of the cost of rubber wheels. NOTE: The precision fit of the small wheel holder attachment is very high. I've hand test fit each one of these custom made poly wheels into an attachment fixture. Expect these to be a very snug fit. If they just don't fit in your fixture, you may have to move one of the press fit bearings slightly (in or out) using a punch and hammer ProductSiteLaunchDate : 2020-04-03T13:45:59.280Z Size : .75" Diameter Style : Length SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 31191600 Voltage : 24 volts