Date: 12/31/1969 Views: 4818
Date: 06/13/2004 Views: 6394
Date: 01/11/2010 Views: 11068
Date: 08/23/2023 Views: 854152
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.