1)Blackboard sticker, Chalkboard sticker stick on wall 2)Easy for using and writing, ... a cloth to erase it 3) material: pvc Blackboard sticker,Chalkboard sticker,Wall sticker,wall decal,Removable blackboard / Home decoration blackboard1 ... , 0.20mm,0.30mm With Thickness. self adhesive children use chalkboard sticker