JEGS High Flow Nozzle Squirter Screws fit most Holley® style carburetors. The hollow stem on this screw allows for more flow and is required on larger squirter nozzles (0.040" and larger). The radiused hex key head design is streamlined for less turbulence and increased airflow. This screw is made from stainless steel, and can be used with gasoline or alcohol. Includes 1 screw and 2 gaskets. .