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The Timloc Vertical Extension Sleeve 150mm Black is a premium accessory designed to extend and enhance the functionality of your building ventilation system. Manufactured by Timloc, a trusted name in building supplies, this extension sleeve is crafted from high-quality, durable materials to ensure long-lasting performance. With its 150mm size, its suitable for multiple applications and installation is straightforward. Its sleek black design seamlessly integrates with various types of architecture while maintaining a professional aesthetic.