TF/34 - FILLER BREATHER WITH FILTER, INTERNAL THREAD -Plastic filler breather with air filter and 3/4"BSP internal thread -Material: Polyamide 66,40 microns polyurethane air filter -Internal flat rubber seal in NBR 70 shore -Red cap with graphic symbol "fill oil " -Specifically designed for use on plastic moulded reservoir; the internal thread allows mounting on to a moulded external thread. This makes the design and manufacture of the plastic reservoir easier