... .Specialized plastic injection channel is set up at angle joint to ensure that theinternal and back of the angle joint is ... .0-2.5mm thickness ,3,4,5 chamber can easily to drain the waterPVC window profile series50mm 60mm, 65mm,70mm, 80mm ... high-top roller,slide easily7.Glass window is easy to get daylighting. Welcome to visit our factory and contact me:Anne XieMob ...