Size: Crystal knob diameter 1.18 inch (30mm) , height 1.3 inches (32mm). Alloy base length: 6.7 inches (170mm). Single hole installation. Easy DIY installation with 3 different screw lengths included: M422mm, M425mm, and M4*40mm, suitable for commonly-used furniture board thickness (typically 18mm). Chic Design: Fashionable and simple crystal and zinc alloy backplate, both exquisite and lovely. The bright, beautiful colors will update your furniture and brighten up your home.Available in four colors – black, silver, gold, and antique bronze. The crystal material combined with the base design makes them even more attractive. High-Quality Material: Made of crystal with a metal alloy base, these knobs have a strong structure that won't easily come apart. The glossy and smooth surface ensures the color never fades. Vintage Charm: Featuring a unique round bead shape and classic vintage style, these knobs are a fantastic addition to any room. They make a delightful gift and add a magical touch to your furniture drawers, cabinets, cupboards, wardrobes, dressers, and more. Package Contents: Each set includes 10 knobs (each set consists of 1 crystal knob and 1 alloy base) and 30 screws (10 pcs of 22mm, 10 pcs of 25mm, and 10 pcs of 40mm).