Material: Crystal glass and aluminum, solid structure and shiny glittering appearance, the best decoration for your home and office. Size: The knobs are about 1.18 inch (30 mm) in diameter, about 1.18 inch (30 mm) in height Application: The crystal knob is very pretty, artistic and durable, ideal for installed cabinets, wardrobes, dressers, drawers, bathrooms, closets, trash cans, wardrobes, newborns' rooms, wardrobes, bedside tables, large jewelry holders, drawers, etc. Easy to install: Find the position where you want to install on the board and drill a hole, then pass through the screw on the back of the board and screw the knob tightly. You may need to purchase screws of a different length depending on the thickness of your cabinet. Package includes: 10 x All Black Knobs