Feature:This heatsink come with thermal conductivity adhesive ,which can provide good cooling results..Aluminum heatsink can be applied on 3D printers, IC , electronic, , computer's chip component heat dissipation or anywhere you need a efficient heatsink.Specification:Color: Silver ToneMaterial: Aluminum AlloyOverall Size: 3 x 12 x 12 mm / 0.12 x 0.47 x 0.47 inch (L*W*H) Package Content:4 x Heatsink