nozzle holder with hole-type nozzle function of the nozzle holder, nozzle, nozzle needle, pressure pin and pressure spring. function of the inlet and outlet ducts. description ordernumber 1174 see also: two-stage twin-choke downdraught carburetor 4A1 injector for engines with direct petrol injection (GDI) Roots supercharger distributor plunger (on a rack)