Frame Material: wooden and aluminium alloy. Open style:openingPayment terms: T/T; L/CDescription:Imitation European structure, beautiful appearance, energy saving, noise canceling, dustproof, waterproofFeatures: 1. material: larch, red pine, spruce,, teak, red walnut timber, top-grade aluminium profile; single, double or low-E glass for your option.2. aluminium and wood combined or wood with aluminium for your option..Cladding 3. opening style: sliding, turning inward, turn outward, tilt inward tilt-turn available.4. accessory:domestic or import as per your needs..5. heat preservation,acoustic insulation, energy saving and enviromental protection.6. available in any size 7. any design as per customer's request.