The bulb wasn't available alone so I had to buy the whole base (socket) and glass cover that contained the bulb as well. I needed two because both bulbs were out. They shipped quickly and I simply took the bulbs out of the two new light units and screwed into my existing ones and I had light. The customer service agent or manager that handled my order was great. We will definitely order again. Just wish oven bulbs could be bought alone and not have to purchase whole light fixture. But that is anywhere! Thank you for the easy experience.