Date: 12/31/1969 Views: 6496
Date: 07/15/2007 Views: 7971
Date: 10/18/2012 Views: 21187
Date: 08/23/2023 Views: 784671
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.