... .Thermal break e.ISO9001-2008 Lasted design sliding door sliding wooden doors FrameSolid woodwood materialsolid pine, white oak,fir .larch ... environmental protection requirements completelyc.heat resistance,noise insulation Opening styleSliding, casement, turn-tilt, tilt-sliding, single-hung, double-hung, etc. ... you.Thank for your attention. Lasted design sliding door sliding wooden doors