uxcell Led Energy Saving Lamp Aluminum Heatsink Cooling Fin Cooler 20mmx6mmx30mm 15pcs Product Name : Cooling Fin;Material : Aluminium Mounting Hole Diameter : 2.2mm;Mounting Hole Spacing : 15mm/0.63" Color : Silver Tone;Outer Diameter : 20mm / 0.8" Inner Diameter : 6mm/ 0.24";Total Height : 30mm/ 0.59" Weight : 193g;Package Content : 15 x Cooling Fin