shutter manual opening window temper glass

alumiuim opening window 1.4 thickness for alumium,red wood colour is normal colour by many familites choose.classic and simple easy match with furniture.double hollow temple glass will not easy broken and safe for healthy not get hurt when the glass is broken will coming pieces by piecs.hollow doubule temple glass will sound proof very well,and heat proof for strong weathers tempreture.the shutter will have two ways used,one is auto another is manual more pretection privce if meeting or house talking.