9-12Watt Power LED Bulb Aluminium Heatsinks Cooling Fin Plate 2 Pieces Product Name : Cooling Fin;Material : Aluminium;Color : Silver Tone Power : 9-12W;Center Hole Diameter (Approx.) : 10mm / 0.39";Mounting Hole Diameter : 4mm/ 0.164" 2.6mm/1" Plate Diameter : 95m/ 3.7";Fin Outside Diameter : 88mm/ 3.5";Fin Inner Diameter : 33mm/1.3" Fin Height : 50mm/ 2";Total Height : 52mm/2" Weight : 363g;Package Content : 2 x Cooling Fin