This funnel was designed to keep jar rims and counters mess-free. The double-walled funnel fits securely over both regular and wide-mouth canning jars. Outer wall keeps the funnel off the work surface preventing contamination, the inner wall is shorter and is placed on the jar keeping the rim clean. It features headroom measurements in inches and millimeters for accurate filling. Allows the necessary air gap for proper sealing. Made of high heat polypropylene and dishwasher safe. Measuring 5 in diameter x 3 in height.