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