1- Pair SwingMate Porch Swing Springs - BLACK Finish - 600 Lbs Capacity, for Heavy-Duty Suspensions, Safe for Hammock Chairs or Ceiling Mount Porch Swings - American Made - Rust Resistant Classic Black. Sold in pairs.Makes any old porch swing more fun. Add springs to your existing ceiling hooks and adjust the chain, then watch the smiles begin. No tools required. Overall size is 8.5 inches long by 1 3/4 inches diameter.