network security protection 1.Good watertightness 2.Various color schemes 3.soundproof & heat insulation 4.Easy install & cl network security protectionFrameAlloy : Aluminium 6063-T5 ... which are stylish, durable, and with functions such as environmental protection, durable, moisture-proofing, corrosion-resistant, soundproofing, heat insulation and fireproofingCertificateISO9001 ...