... 2, Inside wide 5mm 3,26x26mm Book Corner. Specification :metal corner ,book corner ,corner portector ,memo corner Inside width ... product quality, competitive price and service .1,material :A: Metal category :iron/copper/ aluminum/alloyB: Plastic category : ABS PP ... / gold plating /oxidation/ polishing paint (any color)3,Size :Each product has universal sizes in accordance with international standard ,it ...