The HST HEAVY DUTY is the NEW, REVOLUTIONARY Sliding Frame, brought to you by Smart and Safe Systems. It offers high aesthetics, ease of movement and elegance in every space. Available in 8 New Ulti Matt, gloss-free with aluminum-like appearance and texture. The possibility of Triple Glazing up to 51 mm is provided and it consists of 5 chambers in the sheet. It offers sound insulation up to 43dB and security up to RC 2 50mm housing height in the basic version 25mm low guide available Construction possibilities: Two-fold and Four-fold A stainless steel drainage grate is available Possibility of making 2 to 4 sheets