Most heavy-duty scrub brushes use plastic bodies and nylon bristles; some listings also specify polypropylene components or wooden handles/brush bodies.
Brushes range from compact handheld sizes up to long-handled tools. In these listings overall lengths run roughly from 3.94 inches to about 31.5 inches, covering short hand brushes through extendable or long-handle models for extra reach.
Several brushes feature antimicrobial-treated bristles or pads designed to resist odor-causing bacteria. One scrubber pad is specifically described as providing antimicrobial protection against odor-causing bacteria, mold and mildew.