Green Polystyrene Fine-Grade Perma-Sweep Floor BrushCrack-resistant foam block broom head is constructed for durability and versatility. Nonabsorbent synthetic bristles resist acid, oil and bacteria. Effective for wet or dry sweeping applications. Lighter than hardwood blocks. Color coded bristles help match broom head to task at hand. Bristle Material: Polystyrene; Brush Length: 24"; Bristle Length: 3".