For Saf-T Vent® EZ Seal systems with horizontal terminations. Use to penetrate any combustible or non-combustible wall. This part is a thimble only and does not include any vent. Order enough vent to pass through the thimble and extend 4 to 8 in beyond the building sheathing. Includes an AL 29-4C screen cover to terminate the vent system. The assembly may be painted to match the exterior decor.