Liquid Chalk Mark Blackboard 3MM Fine Pen Can Wipe 8 Colors Double Head 4ML Pen Description ： 8 colors liquid chalk free choice. Round head and oblique head can be exchanged freely. The product is composed of environmentally friendly and non-toxic materials. This product has bright colors, smooth writing, and environmentally friendly ink. Applicable scenes: Graffiti DIY, teaching, painting, led fluorescent advertising, body creative, etc. Applicable materials: fluorescent board, led board, store glass, window mirror, blackboard, white board, green board, car window, stone, wood plank, plastic bottle, beer bottle, metal, etc. Applicable gift-giving occasions: opening ceremony, employee benefits, awards commemoration, anniversary celebrations, trade fairs, advertising promotions, festivals, weddings, public relations planning, housewarming, birthdays, business gifts. Product Specfication: Material (composition): PVC Product Size:3mm/0.1" Package Included: 8 PCs Liquid Chalk Mark This pen's innovative design can help you overcome anxiety and bid farewell to difficult choices. This pen adopts a silent bearing design, which is quiet and noiseless. The size is, the writing is smooth, and the feel is comfortable. Difficult choice, indecision, solve it in one fell swoop, bring it home quickly High quality materials: Our pen is made of high-quality and environmentally friendly materials, which are sturdy, durable, and very convenient!