Border material: environmental protection plastic
Type: double-sided
Panel material: galvanized metal
size 1 :18*20 (1 brush with 2 magnetic buttons),
size 2 :20*30 (1 brush with 2 magnetic buttons),
size 3 :25*35 (1 brush, 2 magnetic buttons),
size 4 :30*40 (1 brush with 2 magnetic buttons),
Magnetism: there is magnetism on one side and no magnetism on the other