The 90 Degree Elbow is designed to connect securely and easily to the Air System's Saddle Vent, reducing the chance that your ducting becomes pinched and blocked around the opening. Manufactured with built-in grounding lugs, the Explosion Proof 90 Degree Elbow, when used in conjunction with all of Air System's intrinsically safe products ensures that no risk of explosion exists during normal confined space work or during rescue operations.