Lamicall Motorcycle Phone Holder for Filming 1s Quick Release Insta360 Motorcycle U Bolt Mount NEW Motorcycle Handle Bar Rail Mount 12 37mm Width U Bolt Mounting Base Buy Motorcycle U Bolt Mount Motorbike Mount Insta360 Store Amazon.com: UGREEN Bike Phone Mount Holder, 1S Quick Lock, Motorcycle INSTA360 MOTORCYCLE U BOLT MOUNT MANHATTAN Authorized Retail Store. Motorcycle Metal U Bolt Mount & Strong Grip Holder for iPhone X 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; Accommodates rails from 0. 5 to 1. 25 inch in diameter (1. 2cm 3. 1cm) Two u bolts supplied: 1 x 1 inch (2. 5cm) & 1 x 1. 25 inch (3. 1cm) Zinc coated steel (not rust proof)