describe TOSTEM, a leading Japanese brand of aluminium windows and doors, highlighting its product range and expansion into India. One source focuses on a new, innovative steel door with integrated ventilation, while others showcase TOSTEM’s broader portfolio, including various window and door series with diverse features and design options. The brochures detail product specifications, performance data, and design aesthetics, while testimonials emphasise customer satisfaction with TOSTEM’s quality and service. Finally, marketing materials promote TOSTEM’s presence in India and its commitment to providing comprehensive housing solutions.