Don't forget to add our mounting kit to your gas tank purchase to make for an easy install. This "Hidden" mounting kit recesses into the bottom of the tank for a cleaner install. Weld-On Mounting Plates (2) - CNC cut from 1/4" steel and powder coated Black. Rubber Isolators (4) - With metal sleeves designed to prevent vibration which will lead to cracks. Hardware - 5/16-18 bolts with flat and lock washers. Add our Steel or Aluminum "Tophat" mounting bungs to take the guesswork out of your custom tank install! Dimensions: Mounting Plates: Length = 4-5/16" (Plate Overall) Center-to-Center of Mounting Holes = 3-1/8" Front 3" Rear Width = 1-3/16" Thickness = 1/4" Finish: Zinc plated Bolts/Washers Black Powder Coated Mounting Brackets Fitment: Custom Use for any tank that will accept the above mentioned dimensions.