Optional attachment lets you use the same machine for chalk and paint lines! Stripes a 2" or 4" chalk line with a rotating brush for smooth, even flow using 35% less chalk than most dry-line markers; rust-proof, molded-plastic bin holds 35 lb of chalk. Wet-Line Attachment allows wet-line marking with most field marking spray paint cans. Powder-coated steel frame, three pneumatic tires, and retractable handle. Some assembly required. 25 lb. Also available without Wet-Line Attachment.