Size: Typically 100-500 mm in diameter, depending on propeller size.
Grade: Industrial-grade cleaning tools, often classified by abrasiveness (e.g., fine, medium, coarse).
Viscosity: N/A (not applicable for solid cleaning tools; applies only to cleaning fluids if used).
Buoyancy: Neutral or slightly buoyant to aid underwater handling.
Material: Stainless steel, brass, or polyurethane for brushes; abrasive pads may use silicon carbide or aluminum oxide.