Specification: 1,metal angle ,metal corner ,book corner 2, Inside wide 5mm 3,26x26mm Book Corner. Specification :metal corner ,book corner ,corner portector ,memo ... best product quality, competitive price and service .1,material :A: Metal category :iron/copper/ aluminum/alloyB: Plastic category : ABS PP PE ... if necessary, you can contact with us at any time.... metal book corner in nickel or golden