... finish,anodized,powder coated Cut,punch,drill ISO9001,SGS,ROHS large aluminum heat sink 1. Material: 6063,6061,6060,6005 or ... JB828 Sliding Windows, JB50A Door Window, Curtain Wall Frame etc.)7. Certification: ISO9001,SGS,ROHS,GMC,TUV 8. Strong technical development ... customers' different requirements. 9. OEM service available, customized design available large aluminum heat sink