Date: 12/31/1969 Views: 4245
Date: 12/31/1969 Views: 8018
Date: 07/12/2009 Views: 5922
Date: 08/23/2023 Views: 810936
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.