21-Gallon Receptacle Base Square receptacle base is constructed of fire-safe steel designed to extinguish flames in less than one minute. Includes corner hooks for attaching liner bag or choose an optional plastic liner. Includes no-mar nylon feet and matching vinyl bumpers. With a choice of two snug-fitting tops that lift off for easy emptying: Swing Top Lid with two-way, self-closing doors or Push Top Lid with positive-action, self-closing door *(lids must be ordered separately). Select Lid & Liner Options Below.* 21-gallon capacity. Available in Gray, Sand or White powder coat finish.