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The diameter of the inlet cap is 7 inches. This information can be found in the product description: "7-inch round inlet cap for use with Zephyr 7-inch round ducts."
This answer was generated by AI based on customer and product data.
The diameter of the inlet cap is 7 inches. This information can be found in the product description: "7-inch round inlet cap for use with Zephyr 7-inch round ducts."