Builders Dryer Venting. Offset Elbow, Wall is designed to provide a convenient 90-degree turn within a compact 4-1/2 inch , making it i for tight spaces. This offset elbow features snap-lock fittings and a rotating collar, ensuring a secure and adjustable connection. It includes a clamp specifically for wall connections, for situations where the outlet pipe in the wall projects outward up to 2-1/2 inches and cannot be trimmed. Made from heavy-gauge drawn aluminum, this durable elbow is built to last and comes packaged in a bag for easy handling and storage. Model Number: 10162