WB21X5354 WB17X5133 WB21X5370 WB21X5371  GE Range Burner Simmer Block Valve**IMPORTANT: PLEASE READ BEFORE ORDERING** . **Ensure Correct Part:** To avoid incorrect orders, **please match the part number in this listing to the exact part number on your appliance.** **Buyer Error:** Returns due to incorrect part purchases by the buyer will be accepted, but the **buyer is responsible for return shipping costs.** **Need Help?** Before ordering, if you are unsure about fitment, **send us your appliance's FULL MODEL NUMBER, and we'll check for you.** This simple step saves you time and returns shipping costs. Thank you!