200/300 BAR DIN Male to Paintball / Air Soft HPA Fill Nipple, Foster Style Connector with additional Pressure Test / Dust Plug 200/300 BAR DIN Male to Paintball / Air Soft HPA Fill Nipple, Foster Style Connector. Comes complete with one of our custom designed Charging Cylinder Pressure Test / Dust Plugs so that you can check the residual pressure of your charging tank.