Features: brand new and high quality The water heater knob is made of high-quality plastic, wear-resistant and durable, and has a long service life. The gas stove knob with raised handle is easy to grip and operate. The adjusting knob is small and light, convenient for storage, and does not take up too much storage space. The knob with 6mm (0.24'')/7.2mm (0.28'') shaft hole is durable. It is widely used in most gas stoves and water heaters to adjust firepower or water temperature. Specifications: Material: Plastic Size: Small/Large Small Size: Approx. 33.4x17mm/1.31x0.67inch Small Mounting Hole Distance: Approx. 6mm/0.24inch Large Size: Approx. 37.7x18.5m/1.48x0.73inch Large Mounting Hole Distance: Approx. 7.2mm/0.28inch Package Includes: 1x Rotary Switch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item