The best thing to do is pop off one of your other tooth covers and take it to a const eq. dealer and match it up. You should just replace them all, usually under $10 each. What matters most is the type of attachment used to secure it to the tooth shank. You'll probably be asked about what "type" of tooth you want. They will have single point, forked, flat, etc. Be sure to get new retainers as well. These are the clips or pins that hold the cover on and should be replaced with the covers.