STANDARD SIZE: The connection of this extender is standard 1/2 inch . Compatible with most shower arm in US. PATENT DESIGN, MORE FLEXIBLE & ADJUSTABLE:You can use it as a gooseneck extension to raise your shower head by 5.9inch. You can also use it as a regular extender to keep the shower head extra 11.8 inches away from the wall. You can even lower the shower head by 5.9 inches. Compared with the regular extender, this one can raise the shower head higher or lower and keep the shower head in a horizontal position all the way. METAL construction provides a longer service life. We have thickened the extension arm, the pipe is larger and stronger, it not restrict the water and you don't have to worry about bending during installation. 13 INCH SHOWER EXTENSION ARM: Keeps the shower head away from the wall. You can adjust the height, distance and angle with two knobs to meet your specific needs. The free locking collar allows you to tighten the extender in a correct position. EASY TO INSTALL: The package comes with the tools needed for installation,saving you the hassle of the setup process and saving you time without the help of a plumber., Weight: 0.76831098307 Pounds, Manufacturer: tiyao