MHP Gas Grills WNK4 Natural Gas Grill W/ SearMagic Grids On In-Ground Post. WNK4-NS+MPP. Post & Patio Mount Gas Grills. This MHP natural gas grill features a high profile, thick, permanent mold cast aluminum housing, 433 1/2 square inches of primary grill area (574 total area including SearMagic warming rack), 40,000 BTU stainless H-type dual burner, reversible anodized aluminum SearMagic cooking grids, Nu-Stone fixed side shelf and electronic ignition. Includes 48 inch black, anodized aluminum in-ground post with stainless steel tubing. Includes stainless grease cup for easy clean-up. Some assembly required.