Date: 12/31/1969 Views: 4279
Date: 08/18/2004 Views: 3455
Date: 06/06/2003 Views: 6894
Date: 08/23/2023 Views: 838726
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.