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 The product is composed of and materials. Product Size:3mm/0.1" Package Included: 8 PCs Liquid Chalk Mark Round head and head can be exchanged freely. 8 colors liquid chalk choice.