Perko Gas Tank Vent wSwivel Elbow This Perko gas tank vent sits at a 90 angle made of zinc alloy, with a black polymer cap. It also includes a removable 30 mesh stainless steel wire screen flame arrestor. The design of this ventilator allows the elbow to rotated to any position you need. Specifications For hose size 58 Maximum hull thickness 34 Click here for Perko Gas Tank Vent with Swivel Elbow California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google