These glass shelf brackets are made from zinc alloy materials, with reasonable design and practical functions, aimed to help you fix the glass better. Detailed workmanship, perfect for displaying collectibles, organizing books or exhibiting your latest treasures in any places you want. Features -Color:silver. -Material:Zinc alloy. -Size:8.00X6.40X2.30cm/ 3.14X2.52X0.90inch. -Note:Suitable for 3-30mm thickness glass or wood shelf. - Zinc alloy materials, rust and corrosion resistance, will remain the original look of the glass for a long term. - Keep glass or wood shelves firmly in place, firm and not easy to fall, you can use with peace of mind. - Suitable for 3-30mm glass panel, easy to install with the simple structure, can be adjusted. - Perfect for displaying collectibles, organizing books or exhibiting your latest treasures at anywhere you want. - Durable and sturdy, excellent bearing capacity, polished finish, good protection against scratches or oxidative corrosion. Package list: 4 x glass shelf brackets 8 x screws 8 x expansion tubes