This whiteboard marker is one of our best selling products; four pens are packed together in a blister card. It has several different colors and types for your reference. 1) Fiber tips smooth writing 2) Non-toxic ink and the ink can keep one year 3) Environmentally safe 4Correspond to standards like En 71-3-9 certificate and ASTM D4236 certificates. Imprint: silk, transfer filming imprint etc., logo print available. Packing information: Card: 4pcs/card, 1200pcs/ctn, 73*47*48 G.W. /N.W.: 27KGS/25KGS and Our company is specialized in producing marker pens for more than 20 years, so we have absolute advantages in price and quality control. We are looking forward to cooperating with you,any question just contact us.