Tork 520337 Industrial Centerfeed Single-Ply Cleaning Cloth, Gray System: W1 - center feed and jumbo roll wiper system OR W2 - Wipers combo roll system Ply: 1 - Color: Gray - Print: no Embossing: no - Roll Length: 416.67 ft Number of Sheets: 500 - Sheet Length: 10.0 in - Length per case: 416.67 ft