The bracket is made of steel, and it is safe and non-toxic. It is suitable for bookshelf, storage organizer and board. The bracket can be used repeatedly and durable for long time use. Specifications: Condition: New Material: Steel Color: Silver Style: 3in, 4in, 5in(Optional) Weight: approx.143~210g/ 5.04~ 7.40oz Package List: 2* Brackets Notes: 1. Please allow 0-2cm error due to the manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1. Excellent Material： Round Bracket is made of high quality steel material, odorless, safe and non-toxic. 2. Widely Application: Round Bracket is suitable for book shelf, storage organizer, and board. 3. Easy installation: easy to install the bracket for your book shelf. 4. Reusable and durable: can be used repeatedly and durable for long time use. 5. Durable & Sturdy: Sturdy and it can bear heavy weight, easy to use.