Motorcycle Bike Handlebar Phone Mount Holder Waterproof Case for iPhone Motorcycle Bike Handlebar Phone Mount Holder Waterproof Case for iPhone ROCKBROS Motorcycle Bike Handlebar Phone Mount Holder Waterproof Case Mega Grip Phone Holder Arkon Mounts. Motorcycle Handlebar Mount & Strong Grip Holder for iPhone XS Max Cradle Clamping Dimensions: Cradle will hold phones up to 3. 9 inches wide Lipped grip means phone will stay secure in the holder. The redesigned cradle offers even greater support for larger phones in bumpy conditions. Mount; Suitable for most Handlebars. Fits handles bar struts 16mm 33mm in diameter 360 degree tilt & swivel pedestal mounting has ball joint adjustment & easy to use tightening ring to secure position. PRO fit Twin screw fixing.