Transponder Key Blank Fits 1999 2000 Mazda B2500 B3000 B4000 With Do It Yourself Programming Instructions This is about one uncut transponder key blank with a black plastic head, and the chip included inside the key, tested and ready to be programmed. You can take it to most hardware stores, home improvement centers, or locksmith shops with your working key to cut it and duplicate it. If you have 2 original working keys, you can program this new key yourself. The programming procedure is very easy to follow step by step, and is included with the key. If you have only one working key, you can get it programmed at the dealer or professional locksmith. Any question you have, you can always contact us. We stand by our products, and they are guaranteed to work. It Fits 1999 2000 Mazda B2500 B3000 B4000