Fits SOME Spirit 300 Series (with "Up Front" controls) years 2013 and newer Measures 1.4"H X 2.5"W X 2.5"D "D" shaped valve stem opening measures 1/4" in diameter. Dark gray knobs with a chrome finish top that features the red Weber logo. Genuine Weber OEM part These knobs only fit SOME grills. Please look up your grills schematic to make sure these will fit. Set of 3 main burner control knobs for Spirit 300 Series grills, model years 2013 and newer (with "Up Front" controls). Dark gray knobs with a chrome finish top that features the red Weber logo. "D" shaped valve stem opening measures 1/4" in diameter. Genuine Weber Part. Fits the following models - 46510001 Spirit E-310, Lp, Blk, Gas Grill, 47510001 Spirtit E-310, Ng, Blk, Gas Grill, 46513101 (2014)(LP) Spirit E-310 w/Gbs/Griddle, 47513101 (2014)(NG) Spirit E-310 w/Gbs/Griddle, 46710001 (2013)(LP) Spirit E-320 Grill