LED tunnel lamp heat sink 1.Material:AL6063-T5. 2.Color:Clear anodized,or customized. ... 3.CNC turning,milling. LED tunnel lamp extruded aluminum heat sink It's hold good heat dissipation and smart surface treatment ... coated, Chromating, Passivating, Electrophoretic coated and etc.4.Purpose: Heat sink, Decoration, Electronic equipment frame, Production line table, furniture, etc. We ...