Suitable for 1 Gallon Mason Jars: The filter is specifically crafted to fit 1 gallon Mason jars. It fits within a 4” wide opening and is compatible with almost any standard 1-gallon mason jars. Great for Cold Brew: The fine mesh screen keeps out the grinds during both the brewing stage and the refrigeration stage, and it allows your fresh cold brew to seep/steep through effortlessly. Versatile Use: The filter transforms any 1-gallon mason jar into a gourmet cold brew, iced tea maker, or fruit infuser, catering to all your beverage needs. Ideal for Entertaining: Designed to fit 1-gallon mason jars, this filter helps to brew large batches of cold brew coffee or tea for large gatherings, ensuring there’s enough drinks for everyone. Simple Cleaning: Simply hand wash and rinse the stainless steel filter with water, or put in the dishwasher for a quick cleaning. cold brew filter