JIS F 7409 Bronze 16K Screw Down Check Globe Valvesmarine Screw Down Globum Valvae Valvae etiam appellatur sicut valvae marinae SDNR, valvae marinae sistenda valvae, globus marinus non valvae returnae, globus marinus valvae reprehendo...etc.Function: aperta/clausa systematis fistulae et ne medium fluat.