Ball finial for 1 1/2 inch diameter indoor or outdoor curtain rod. Available in two colors in stock, ready to ship. It can be used indoor or outdoor. Use on those windows that face patio or pool area, or use inside on any window. Charleston collection by Design Elements. Finish: Powder coatedMaterial: Resin (indoor use only), AluminumUse indoor and outdoor4 1/2 inch long by 3 1/2 inch wide Priced each.