Perko 0542 Vented Fill f/1-1/2" Hose - Angled Neck - Gas - Black Black Polymer Cap with Black Polymer Body Black Polymer Strap Integral Tank Vent with Flame Arrestor and Anti Surge Valve Technical Information For Hose Size: 1-1/2" For Vent Hose: 5/8" O.D. Flange: 3-5/8" Neck Length: 2-7/16" Mounting Hole.