These are a high-quality die stamped exact reproduction of the 702 and 2702 Princess base pad. Made of a durable rubber & cork combination the same as Western Electric used. These will also work on a 701. These are self-stick with a peel off backing. The adhesive is high quality and sticks tight.
To replace your base pad, just heat up the old one and scrape it off, it's very easy to do. A heat gun or blow drier will work.