3M(TM) Safety-Walk(TM) Medium Resilient Tread 310, Black Tread, 6 in x 24 in, 50 per case Features a resilient, non-mineral, slip-resistant material. Black, 6 in X 24 in, 50 per case. Features a resilient, non-mineral, slip-resistant material. Soft surface is suitable for bare feet. For locker rooms and recreational/athletic equipment, boats and docks, interior stairwells, entryways and lobbies. Available in custom sizes and colors, and with custom adhesives.