FABTEK FCLC-1 Fin Clamp Hydronic Baseboard Element Additional Fins, 1' Section For 1-1/4" Copper 1 foot section can be sized to fit your needs, eliminates cold spots More durable than original fins, made with heavier gauge metal The 4-1/4" fin will produce 1527 btu's per linear foot of active element 4-1/4" fin fits 1-1/4" copper pipe <a href="https://www.amazon.com/b?node=14770868011"> International products </a> have <a href="https://www.amazon.com/gp/help/customer/display.html/ref=nav_cs_help?ie=UTF8&nodeId=202045290"> separate terms, </a> are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Manufacturer warranty may not apply <a href="https://www.amazon.com/b?node=14770868011">Learn more</a> about Amazon Global Store.