Gas Knobs: This gas knobs replacement accessory is made of high-quality zinc alloy with a smooth surface, strong and durable material, anti-rust and wear-resistant,cooker hob knobs Size: he length of this cooker oven hob control switch is 39mm/1.53inches, and the shaft holes are 6mm/0.23inches, you need to measure the diameter of the furnace shaft before ordering,cooker hob knobs Easy to Install: Align the slots of the stove control knob with the stove connector and press to install, no other tools required. Design: It has ergonomic design, the surface is smooth and the design is in the middle of 0 degrees. The marking on the button allows you to identify the correct setting direction and rotate easily when in use. Wide Application: Gas stove knob for 6mm diameter d-axis stove switch, widely used in gas stoves, cookers, ovens, etc. In-home restaurant kitchens,cooker hob knobs