The Fermentap Weldless Stainless Steel Sight Gauge is perfect for homebrewers and small - scale commercial brewers. Use it to easily monitor the liquid level in your brewing kettle, especially in the HLT on the top tier of your brewing setup. It's designed for kettles up to 10 gallons, and you'll need to drill a 1' hole in your kettle to install it. The sight gauge is 11' long, and it has a 1/2' FPT on the base for thermometer upgrades. The product is made of stainless steel and high - temp food - grade gaskets, ensuring long - lasting performance.