Fangrui Product Details Metal Construction Provides A Longer Service Life. We Have Thickened The Extension Arm, The Pipe Is Larger And Stronger, It Not Restrict The Water Flow And You Dont Have To Worry About Bending During Installation. 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. 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. Standard Size: The Connection Of This Extender Is Standard 1/2 Inch . Compatible With Most Shower Arm In Us. Easy To Install: The Package