“SERIES NASA” are 3 mm skin thickness and have 3 chambers.They provide single glass,double glass and panel applications.With their cases designed as two railed and fix fix division they give the possibility of making all kinds of sliding system windows.SERIES”NASA” can provide the details which are non attainable by the others still today by its extraordinary design features.With sliding system,they provide horizontal movement with both upper and lower sides as a single unit,give the possibility of making a fix division without using a wing profile and in addition the chance of using horizontal or vertical in between register in the wing.While adjusted metal reels provide an easy and silent opening and closing,in adition with the help of specially designed EPDM and brush gaskets,they provide a high degree of isolation for heat,noise and dust.The provided locking mechanism enhances the security to the maximum level.They are ideal solutions,which provide wide viewing angle in narrow places.