Date: 12/31/1969 Views: 6813
Date: 04/15/2006 Views: 6831
Date: 03/12/2012 Views: 13526
Date: 08/23/2023 Views: 829633
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.