Tote-N-Stor products allow you to easily dispose of wastewater without having to break camp. All tanks come completely assembled and are made of blow-molded light weight and sturdy polyethylene, they won't rust or corrode. Tote-N-Stor tanks can be used for gray and black water.• Compatibility: Tote-N-Stor Portable Waste Holding Tank• Type: O-Ring Adapter• Diameter (IN): 2.99 Inch• Color: Black• Material: ABS Plastic• Quantity: Single | Tote-N-Stor Waste Holding Tank Fitting in Black | ABS Plastic