OdiySurveil(TM) 15Pack 5-Size 15x15mm IC Chipset GPU CPU Thermal Heatsink Copper Pad Easy installation for your DIY arduino projects,with good heat dissipation effect; Material : copper,Size : 15*15mm(L*W),Numbers: 15 Pieces; 100% copper, cut and polished,High performance Thermal Heatsink; Shims are used between the CPU/GPU and heatsinks to provide better cooling for your PS3,ect; Package Content:15x OdiySurveil Copper Thermal Heatsink.