

The 4" Oval B-Vent Flat 45 Elbow (Part Number: 4MO45F) is designed to smoothly redirect airflow for optimum ventilation efficiency. This durable elbow is listed and tested to UL 441 standards, ensuring safe operation. Compatible with L89-827, this elbow features a galvanized casing and positive twist lock connection for secure installation. Warning: Cancer and Reproductive Harm - www.P65warnings.ca.gov.