Circrane is constantly looking at how we can bring the best homebrewing products to the masses. Our main focus is on hydrometer testing kits. We have a variety of hydrometers for homebrewers and distillers and they can be bought as kits with our awesome glass test jar and stainless steel brush. We designed our borosilicate glass test jar to solve the pain points we were having with using so much brew to take a test. We knew a 1-piece borosilicate glass jar was needed for quality of the product, scratch resistance and sanitation, product strength for distillers and a potentially wide range of sudden temperature changes.