Specification Brand : SI BulletPoint1 : Prevents damage to walls and furniture from wire shelving carts BulletPoint2 : Compatible with all 1" diameter Metro-Style wire cart posts BulletPoint3 : Made with a dense plastic that absorbs shock BulletPoint4 : Simple installation - simply insert the post through hold and add caster (wheel) beneath BulletPoint5 : 3.5" diameter, 1" diameter hole ItemDisplayDimensions_Height : 1 inches ItemDisplayDimensions_Length : 3.5 inches ItemDisplayDimensions_Width : 3.5 inches ItemDisplayWeight : 2.5 pounds ItemName : Shelving Inc. Wire Shelving Donut Bumpers, 4 Count ItemPackageDimensions_Height : 1 inches ItemPackageDimensions_Length : 12 inches ItemPackageDimensions_Width : 12 inches ItemPackageQuantity : 4 ItemShape : Round ItemTypeKeyword : door-stops ModelNumber : SI-ADB5-4 MountingType : Wall Mount NumberOfItems : 4 PartNumber : SI-ADB5-4 ProductDescription : Add these donut bumpers to each post on wire shelving carts to prevent damage to walls and furniture. The thick plastic construction absorbs shock from crashes. Simply slip bumpers on and then attach casters to install. Compatible with all 1" diameter wire shelving posts, including Metro, Alera, Regency, Shelving Inc., Winco, Eagle, and more. Sold in a 4 pack. ProductSiteLaunchDate : 2017-09-21T20:53:42.462Z Style : Simple UnitCount : 4