Features: There are 2 styles, square/large square shaped with different scale, choosing based on your needs. Made of quality stainless steel, anti-rust and corrosion resistance, long for time service. Pulling this metal gauge tool out of your pocket to measure metal is quicker and easier than using a tape measure. You can determine the thickness of the material before welding or processing and measure the most popular welding thickness quickly and accurately. The sheet thickness gauge is useful for checking metal sheet wire size before welding or working, and is also durable and easy to read. Specifications: Material: Stainless Steel Square size: 72.4x25mm/2.85x0.98in Large square size: 122x41mm/4.8x1.6in Standard: square/large square(optional) Square measuring range: 24GA (.0239) 22GA (.0299) 20GA (.0359) 18GA (.0478) 16GA (.0598) 14GA (.0747) 1/8" (.0125) 10GA(.1345) 3/16" (.1875) 1/4" (.250) 5/16" (.3125) (.024") (.030")(.035") Large square measuring range: 11-36 Package Includes: 1X Metal Sheet Thickness Gauge note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.