Weldless 16" Stainless Steel Sight Gauge for Brew KettlesThe Weldless 16" Stainless Sight Gauge is a professional volume tracking upgrade for any brewing kettle or mash tun. This kit features a borosilicate glass tube protected by a stainless steel shield and includes a weldless bulkhead assembly for easy installation in any vessel by drilling a single 1 2" hole. It allows for precise monitoring of pre boil and post boil volumes, which is critical for hitting your target gravity and batch sizes.