Built-to-Last & Watertight Roof Pipe Boot: The roof pipe flashing boot fits pipe OD (outer diameter) from 250 to 450 mm. With a corrosion-proof silicone cover, it withstands high temperatures and freezing conditions. The flexible aluminium base allows for easy cutting and installation, handling various roof materials and slopes. Durable and tightly sealing, it is the ideal choice for preventing roof pipe leaks.