Keeps fuel from spilling out of the vent tube in case of a roll over, with mesh screen to keep out debris Allows fuel tank to breathe, remote mount type, with 5/16" hose barbed hookup for long fuel filler necks Uses for Holley EFI and regular carbs set up, conntcted to the tank vent and the fuel pump module vent using a length of hose Needs to be mounted verticlly and above the level of the tank without dips in hose Comes with a metal bracket which is made for external mount, easy installation Part Type: Fuel Tank Vent Valve Kit Fitment Type: Universal Custom Fit Mount Type: Remote Mount Material: Aluminum, Stainless Steel, O-Ring Color: Black Finish: Machined Connection Barb: 5/16" Reference Number: 19-174 Description: · Keeps fuel from spilling out of the vent tube in case of a roll over, with mesh screen to keep out debris · Allows fuel tank to breathe, remote mount type, with 5/16" hose barbed hookup for long fuel filler necks · Uses for Holley EFI and regular carbs set up, conntcted to the tank vent and the fuel pump module vent using a length of hose · Needs to be mounted verticlly and above the level of the tank without dips in hose · Comes with a metal bracket which is made for external mount, easy installation Fitment: Universal for Holley EFI Fuel Tank