PRODUCT FEATURES  

1.The frame size is 137mm; 

2.The use of 304 stainless steel rail,push and pull more smoothly; 

3.A variety of opening structures are optional,1 fixed sash 1 movable sash/2 fixed sashes 2 movable sashes,etc.; 

4.Fitted with  D-type  handle  lock,simple  and  convenient  operation; 

5.Silicified tops form two sealing rings to ensure sealing performance; 

6.The new design of double load-bearing pulley and upper positioning wheel has high load-bearing capacity and improves the safety of the system; 7.Optional  indoor  and  outdoor  aluminum  alloy  casing,more aesthetic appearance.