"Loos Leaf Binder Rings,1Inch Nickel Plated Steel Metal Book Rings for School,Home,Office,50 Pcs/Box, Silver" Loose leaf ring is made of nickel plated steel, strong and durable, Multi-layer nickel-plated steelrings prevent rusting, color unfading. 30mm diameter, meet your needs according to your items dimension. Package includes 50Pcs silver binder rings, each ring can hold up 175 sheets paper. These metal rings are nickel plated steel, durable and rust-proof. Each ring is made to ensure simple opening and firm closure. Binder rings are suitable for loose-leaf, memo filing, note cards, paper cards, scrapbook, binding recipe, book, key rings, invoices, swatches, sample holders and more.