The classic Forge shower arm consists of a 2-5/16-inch diameter mount with an 1/2-inch IPS inlet, a 4-1/16-inch length from one end to the other. The tip of the arm is threaded allowing connection to other water products. Fine Artistic craftsmanship Designed for a lifetime of performance 4-1/16-inch length Premium finish 1/2-inch IPS Part Number: DK150C8 Item Weight: 12.8 ounces Product Dimensions: 4.6 x 2.3 x Designed by Kingston Brass, the Kingston Brass Plumbing Parts 4" Shower Arm is built for lasting quality and everyday use. Shop at OJCommerce and explore our collection with free shipping on every order.