Specification Brand : BHA BulletPoint1 : Load Resistant Calcium Coating BulletPoint2 : Resists gumming up or chip adhesion - extends life of disc and protects work piece BulletPoint3 : Contaminant Free: Less than 0.1% Iron, Sulfur and Chlorine - will NOT cause after-rust BulletPoint4 : Type 29 - 15 Degree Angled Grinding Surface BulletPoint5 : Works Well on: Aluminum, Copper, Nickel, Zinc, as well as other "Soft" Non-Ferrous Metals Color : Brown CompatibleDevices : Angle Grinder ConstructionType : coated,grinding ExternallyAssignedProductIdentifier : 00840134206769 ExternallyAssignedProductIdentifier1 : 0835553003105 ExternallyAssignedProductIdentifier2 : 835553003105 ExternallyAssignedProductIdentifier3 : 50051141556357 ExternallyAssignedProductIdentifier4 : 0640026930549 ExternallyAssignedProductIdentifier5 : 00012382506605 FasteningType : Threaded Hole GpsrSafetyAttestation : 1 IncludedComponents : 2PCS high performance aluminum oxide flap discs IndustryStandardIdentifier : Type 29 ItemDisplayWeight : 1.61 pounds ItemName : BHA Calcium Coated Flap Discs for Aluminum Type 29, 4.5" x 7/8" - 5 Pack (60 Grit) ItemPackageDimensions_Height : 13 centimeters ItemPackageDimensions_Length : 6.6 centimeters ItemPackageDimensions_Width : 12.8 centimeters ItemPackageQuantity : 5 ItemShape : Round ItemTypeKeyword : abrasive-flap-discs Manufacturer : BHA Material : Ceramic MaximumRotationalSpeed : 13300 rpm ModelName : Aluminum Oxide Flap Discs ModelNumber : 4490-5 NumberOfItems : 10 PackageLevel : unit PartNumber : 4490-5 ProductDescription : The Black Hawk Abrasives 4.5” x 7/8” T29 Flap Disc for Aluminum is a breakthrough in soft metal grinding technology. With premium ceramic grains, calcium stearate coating, and sturdy polyester flaps this 4 ½ inch sanding disc will stay cool, prevent loading, and last very long. The secret to this disc’s effectiveness and longevity is in the white stearate coating. As the disc is used the stearate becomes liquefied, creating a protective barrier on the work piece, both lowering the work piece’s temperature and preventing clogging (A.K.A. “chip adhesion”) on the disc itself. Under the same conditions a standard zirconia or aluminum oxide flap disc may distort or warp the work piece while gumming up, drastically reducing the useful life of the flap disc. For these reasons the BHA’s Aluminum 4.5 inch flap disc is the ideal choice for all soft non-ferrous metal sanding applications including copper, nickel, zinc and of course Aluminum! To maximize your effectiveness, reduce disc change down time, and protect your material look not further, this is your flapper disc. ProductSiteLaunchDate : 2016-01-11T08:00:00.000Z SafetyDataSheetUrl : https://ace.infotrac.net/getmsds.aspx?SKU=2329662 Size : 60 Grit Style : T27 Giant SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 10 UnspscCode : 31191600