Easy installation, simply twist to screw into place. Shower arm fits most shower heads. It measures 5.5-inches in length and 0.5-inches in diameter. Flange measures 2.4-inches in diamter. Is cUPC and ASME compliant.The Design House spout comes with a 5-year limited mechanical and finish warranty to protect against defects in material and workmanship. Designed and manufactured by Design House, the trusted source for quality lighting, hardware, plumbing, kitchen, and bath products for every taste and budget.