Our thermometer probe port makes it easy to feed probes into your grill without crushing or damaging the sensor cord under the lid BBQ probe port accessories are made from high-temp-resistant, food-grade which makes for a nice seal, fits snugly Size: Overall diameter 1.65 inch/4.1cm, Hole diameter 1.25 inch/3.1cm, Thickness 0.35 inch/0.89cm Holds the probes and wires well. No longer have to worry about crimping probe wires under the lid. The small round hole is fit for smaller probes and the larger slot port is great for large or probes Just need to drill a 1-1/4"(3.1cm) hole in the side of the grill