Cooling Pads28mm Aluminium Heatsink Round for 1W 3W 5W High Power led 28mm diameter single 3W downlight/ceiling light LED radiator/piece, small lamp radiator28 mm in diameterSolid to 13 mmPurpose: LED lamp heat dissipation 1W or 3W ,5WPlacement: LED octagonal aluminum substrate ( diameter 22mm, lumen 18.6mm) was placed on the radiator, tapping bud M3*2pcs treatment: aluminum colorHole moment: 19mmPackage: 1pcs radiator