This traditional shower arm of 400 mm is brass with special brass plating is considered universal, having a standard half inch connection (13 mm). The shower arm is suitable for use with medium to large shower heads (200 - 400 mm). This traditional looking shower arm has a round shaped pipe and a round flange to cover the transition from the wall. This shower arm will not affect the flow of water from your mixer tap to the shower head. This product carriers a 5 year warranty for any manufacture defects. DisclaimerBrushed Bronze consists of mostly Copper and Zinc elements.The Antique Brushed Bronze finish is used for decorative purposes.Brushed Bronze plating, usually has a reddish to golden brown colour. Tivoli Brushed Bronze Taps, shower heads and accessories are lacquered/wax coated.Over time with the brushed bronze finish being exposed to the elements, the copper particles may start to change colour to a greenish, black, white and turquoise hue due to the oxidation process, giving the product more of an antique and classic design.This is not a defect but a feature of the plating. Brushed Bronze Tivoli Taps, Shower heads and Accessories are for the antique and/ or rustic enthusiast looking for an aged and classical timeless look in the home.