Specification Brand : FOTGA BulletPoint1 : It features arca swiss bottom plate for attaching your lens to Ball Head, Clamp or Panorama Head of Arca-Swiss standard.There are also 3/8″-16 and 1/4″-20 holes at the bottom for attaching on tripod,light stand,etc. BulletPoint2 : This tripod mount ring helps fix and balance your tele lens which is heavy or long lens hanging off the front of camera. BulletPoint3 : Suitable for Nikon Nikkor Z 180-600mm f/5.6-6.3 VR Lens.Built-in inner cushion to avoid scratch. BulletPoint4 : Made of aluminum alloy.Ring dia is 80mm/3.1in,weighs 188g/0.41lb. BulletPoint5 : Package includes: 1 x Lens tripod mount ring IncludedComponents : lens tripod mount ring ItemName : FOTGA Lens Tripod Mount Ring Lens Collar Ring for Nikon Nikkor Z 180-600mm f/5.6-6.3 VR Lens Built-in Arca Swiss Plate 1/4"-20 3/8"-16 Holes Mount to Tripod ItemPackageDimensions_Height : 9 centimeters ItemPackageDimensions_Length : 18 centimeters ItemPackageDimensions_Width : 13 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : tripod-lens-mount-rings Manufacturer : Fotga ModelName : Generics5tgq1fzv7 ModelNumber : Generics5tgq1fzv7 NumberOfItems : 1 PartNumber : RJ058 ProductDescription : Fotga lens tripod mount ring lens collar ring for Nikon Nikkor Z 180-600mm f/5.6-6.3 VR Lens built-in arca swiss plate 1/4"-20 3/8"-16 holes mount to tripod. ProductSiteLaunchDate : 2023-08-29T07:46:42.390Z Size : For Tamron A058 and Sigma 100-400mm DG HSM SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 WarrantyDescription : 3 months