Made of aluminum slats, good looking and security. It can open by remote/switch or by hand. rolling window,aluminum roller shutter window, roll up window.Made of aluminum slats, good looking and security. It can open by remote/switch or by hand.The aluminum slats thickness is 1.0mm+1.0mm.If any need, please contact me by 86-13760677858.Best RegardsLuan OKM remote & manua roller shutter windows