Some installation tips: Wear gloves when removing the microwave case or working on the back of the oven. From what I've read, microwave ovens have a capacitor that can do a lot of damage even when the oven is unplugged. I took the cover off ours to figure out what replacement bulb I needed. The RCA RMW1112 microwave requires a torx bit for the back screws and a standard Philips bit for the side screws. Slide the cover back slightly, after which it can be easily removed. I removed the spade connectors from the light by prying them out with a flat head screwdriver. The lamp base is secured with a single Phillips head screw. I removed it and tried unscrewing the lamp from the base to find out the part number or lamp size. He got off the ground. It turns out that the butt and base are combined and sold and installed as one piece. In any case, this lamp is suitable for the RCA RMW1112 microwave oven. And you get a spare to throw in the box.