This is a direct replacement for the slider felts that have no doubt cracked up and started falling apart in your Scout II quarter glass tracks. These are sold as a pair, so it is enough for both sides on your Scout. You'll need to remove and disassemble your window assembly, then finish chiseling out the old, hardened felts first. After that chore is complete, you will use weatherstrip adhesive and press these new guys into place and let it cure up. Reassemble and ride rattle-free. Well worth the time and effort!