... c.Natural environmental wood windows d.Thermal break e.ISO9001-2008 Lasted design sliding door sliding wooden doors FrameSolid woodwood materialsolid pine, ... resistance,noise insulation Opening styleSliding, casement, turn-tilt, tilt-sliding, single-hung, double-hung, etc.CertificateISO9001-2008PackingCartons and ... with you.Thank for your attention. Lasted design sliding door sliding wooden doors