WirthCo Funnel King Drain Top for Drum Funnel is designed to fit the 4-quart Drum Funnel #32900 and #32910 or any 5-gallon pail/bucket. The drainage lid is made of polypropylene and will hold up to 12 standard quart bottles. The top inner diameter is 11-3/4 inches. For over 30 years, WirthCo has been a prime manufacturer of practical products for making life easier and safer. California Prop 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.