Renew your gas grill with Unicook control knobs, which are made of high-quality material, design to fit most gas grills with D-shape valve stem. <br><br> <b>Specifications: </b> <br>Material: Chrome plated ABS plastic, silicone <br>Inner Diameter of Adapters: approx. 0.26”/6.5mm, 0.315”/8.0mm, 0.334” / 8.5mm <br>Knob Dimension: 2.25” diameter x 1.5” height <br>Package Includes: 4 knobs and 12 adaptors<br><br> <b>Installation Tips: </b><br> 1.Turn off gas supply. <br> 2.Remove the broken control knobs from your grill or stove. <br> 3.Choose the adaptor that fits your grill model. <br> 4.Fit the chosen adaptors into the knobs. <br> 5.Pop the control knobs into place on your grill. <br><br> <b>Care and Use: </b><br> No tools needed. Easy to install. <br> Warm note: The size of the shaft in your grill or stove should match the "D" posts inside diameter of our control knob. Please check the size of your original parts and compare to the specs on our product listing before ordering.