uxcell Silver Tone Aluminum Cooler Radiator Heat Sink Heatsink 40mm x 40mm x 20mm Product Name : Heatsink;Material : Aluminium Overall Size : 40 x 40 x 20mm/ 1.6" x 1.6" x 0.8" (L*W*H) Package Content : 1 x Heatsink; Weight : 16g Aluminum heatsink cooling Strong heat conductivity and heat dissipation