... 2.single or double toughened glasses 3.good sound proof and water proof folding door We have more than 30 years experiences at ... +6,5+12A+6,5+24A+6,excellent thermal-isolation,sound-isolation performance,thief-prevent sadety performance. *Full-function collocate ... -azimuth to enhance the performance of water-leakage,air-leakage,sound-isolation,thermal-isolation. *Can collocate the silencer to enhance ...