Double walled canning funnel fits wide and regular mouth canning jars; outside sits on counter, inside is shorter and sits over jar Features headspace measurements for precise filling; allows necessary air space for proper sealing Outer collar keeps funnel off the counter when not in use; avoids contamination and countertop mess Measures 5.13-inch diameter by 3.25-inch high High heat polypropylene won't stain; dishwasher safe