Sold as one unit. (1 unit = Cd/4 x 6.) Use on white boards glass etc. Low odor. Quick drying. Smear-free. Use with dry erase board (SKU # 93465). Peggable card. 4 pk. Black, Blue, Red, Green. Manufacturer number: 80174. SKU #: 90085. Country of origin: (TBA). Distributed by Sanford Corp.