for hob with knob with 6 mm shaft diameter Zinc alloy material, a molding, durable, the quality is good Small and light, simple and modern design, and Built-in hole for easy installation, surface is easy to clean and comfortable to grip Perfect gadget for family or restaurant kitchen, widely used for cooker, stove, oven etc. Specifications: forward 0 degrees Material: zinc alloy, solid and durable,have long service time. Size: diameter 4cm / 1.58 inch, height 2.2cm / 0.87 inch color: silver Weight: 18g / piece 6mm shaft core Package Contents:8 x Stove Knobs Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.