Specification Brand : GLOTRENDS BulletPoint1 : The aluminum alloy heat sink is only suitable for CM4 (Raspberry Pi Compute Module 4) BulletPoint2 : 2 installation methods: Method A: Attach this heatsink to the CM4 motherboard; Method B: this heatsink with CM4 motherboard as a unit to attach to IO board. For more details see the pictures. BulletPoint3 : Heatsink Dimesion: 55mmx40mmx5mm/ 4.4" x 1.6" x 0.2"(L*W*H); Heatsink Weight : 0.5 oz / 14 gram BulletPoint4 : Notched for antenna section: no hindrance to the antenna BulletPoint5 : Package Inlcudes: 1 x Aluminum Heatsink; 1 x Thermal Tape; 4 x Standoff; 4 x Nut; 4 x Rubber Gasket; 4 x M2.5 long screws; 4 x M2.5 short screws; 1 x Screw Driver Color : Multicolored CoolerHeatsinkCompatibility : Raspberry Pi B, B+, A+, 2, 3, 4 model B and B+ and Pi Zero/Zero W, Jetson Nano series products, RockPi series products ExternallyAssignedProductIdentifier : 6091022469153 ExternallyAssignedProductIdentifier1 : 768470320843 ExternallyAssignedProductIdentifier2 : 0768470320843 IncludedComponents : TEC1-12706 ItemName : GLOTRENDS Aluminum Heatsink Kits for CM4 Motherboard (Raspberry Pi Compute Module) ItemPackageDimensions_Height : 13.589 centimeters ItemPackageDimensions_Length : 2.0066 centimeters ItemPackageDimensions_Width : 11.303 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : desktop-computer-heatsinks Manufacturer : glotrends ModelNumber : ZY-007 MountingType : Tabletop NumberOfItems : 1 PackageLevel : unit PartNumber : CM4 Heatsink ProductDescription : Aluminum Heatsink Kits for CM4 Motherboard (Raspberry Pi Compute Module) ProductSiteLaunchDate : 2022-06-13T05:01:42.350Z Size : 180mm x 8mm x 3.0mm SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1 UnspscCode : 32131000 Voltage : 5 volts