Shenzhen frameless folding balcony glazing Balcony Deluxe uses aluminum, high-grade glass production. Frameless balcony window accessories made of high carbon steel bearings and pulleys POM manufacturing hardness, abrasion resistance, aging resistance. Can withstand tens of thousands are sliding sash. Frameless balcony window glass four monolithic force, the main round three, round two-story design deputy. Free bridge, multi-beam force pulley through the mouth and will not appear jerky. Frameless balcony window with a unique built-in anti-collision strip down beam design, to a greater extent solved the sliding frameless balcony window during the silencer issue, bumper strips using automotive-grade materials EPMD, 20 years of weathering insurable truly gifted without looking back. Frameless balcony window is the use of earth lock design, the switch can be done with one hand, easy to operate, durable. Factory direct, affordable, inquire for more details please visit: http://www.szygm.com/list-67-1.html