Date: 12/31/1969 Views: 9467
Date: 12/01/2004 Views: 7684
Date: 04/09/2016 Views: 14006
Date: 08/23/2023 Views: 769181
Old 1/4 in (6.4 mm) vent on the top. Totally inadequate for the job. New 3/8 in (9.5 mm) vent on the bottom.