Specification Brand : BRCOVAN BulletPoint1 : The ball mount kit comes with three rubber ring inserts. Three rubber ring diameter: 0.39''(10mm), 0.47''(12mm), 0.55''(14mm). You can add or remove them depending on the size of the rails. When the rubber ring inserts is not embedded, the hole diameter of the mounting base is 0.63'' (16mm) BulletPoint2 : This 1'' ball mini mount base fit for round rails diameter: 0.39''(10mm) / 0.47''(12mm) / 0.55''(14mm) / 0.63''(16mm) BulletPoint3 : Compatible with RAM Mounts & BRCOVAN any B size 1'' ball double socket arms BulletPoint4 : Main body made of 6061-T6 aluminum alloy. CNC machining and Class iii hard anodized finish BulletPoint5 : Black Color: The black color of the mount blends discreetly with most vehicle interiors. Color : Black CompatibilityOptions : Compatible with B size 1 inch ball soket arm CompatibleDevices : Compatible with RAM & BRCOVAN B size 1 Inch ball socket arm. Suitable for installation on round rails/bolt heads/rear-view mirror/mini handlebar from 0.39 inches to 0.63 inches in diameter CompatiblePhoneModels : Compatible with 1 inch ball double socket arm. CompatibleWithVehicleType : Suitable for installation on bike, bicycle, motorcycle, stroller, mountain bike, dirt bike, trek bike, road bike, golf cart, electric scooter, ATV, etc. ExternallyAssignedProductIdentifier1 : 689776122088 ExternallyAssignedProductIdentifier2 : 0689776122088 GpsrSafetyAttestation : 1 ItemName : BRCOVAN Mini Clamp Mount Base with 1'' TPU Ball Compatible with RAM Mounts Double Socket Arm Fit Rail Diameter 0.39'' 0.47'' 0.5'' 0.63'', Aluminum Material, CNC Processing, Anodized Surface ItemPackageDimensions_Height : 8.6106 centimeters ItemPackageDimensions_Length : 4.3942 centimeters ItemPackageDimensions_Width : 7.0104 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : gps-vehicle-mounts Manufacturer : BRCOVAN Material : Main body 6061-T6 aluminum alloy material, TPU over-molding ball head, soft rubber ring inserts ModelName : R19 - 1 inch ball ModelNumber : R19-2,5cmKugel-001 MountingType : Rear-view mirror, mini round rail PartNumber : R19 - 1 inch ball ProductDescription : The mini clamp mount base with 1'' TPU ball compatible with RAM Mounts B Ssize 1 inch ball socket arm. Fit for rails diameter 0.39'' 0.47'' 0.5'' 0.63'' ProductSiteLaunchDate : 2021-12-13T08:00:00.000Z Style : R19 - 1 inch ball SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable UnitCount : 1 UnspscCode : 43191615 WaterResistanceLevel : waterproof