Date: 12/31/1969 Views: 6589
Date: 06/07/2008 Views: 5406
Date: 12/05/2008 Views: 5524
Date: 08/23/2023 Views: 704514
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.