FC1 is the oval foam model intended for an outdoor faucet. Consider the faucet’s projection, surrounding wall and nearby obstructions before choosing it. The product’s purpose is insulation; the name alone is not evidence that it will fit every handle or wall arrangement.
A cover does not repair a dripping valve or establish the condition of the pipe inside the wall. If the faucet already leaks or has suffered freeze damage, address that condition separately. Seasonal insulation should be one part of the manufacturer-appropriate preparation for the actual fixture and exposure.
This selection is the foam FC1, not a separate hard-plastic cover or a multi-pack bundle. Check its condition and fit when preparing for winter and again when removing it. The actual exposure and pipe conditions still matter when deciding how to prepare.