microporous vent plugs

This image shows our 2 inch and 3/4 inch yellow vent plugs. Vent plugs feature a relief hole covered by a microporous membrane.
SPP-C39-9AD – 3/4″ Yellow Vent Plug with Gasket – Fine Thread
SPP-L10V-9WL – 2″ Buttress Yellow Vent Plug – Coarse Thread (On Left)
SPP-L16V-9WL – 2″ NPS (Fine Thread) Yellow Vent Plug with Microporous Vent in Center (On Right)