Insta360 Motorcycle U Bolt Mount Kit Metal Motorcycle Bike Phone Holder Aluminum Alloy Anti slip Bracket GPS Buy Motorcycle U Bolt Mount Motorbike Mount Insta360 Store Motorbike Metal U Bolt Mount Kit & Quick Grip XL Holder for iPhone 11 Iphone 13 Pro Max Motorcycle Mount Iphone 6 Plus Motorcycle Holder. Motorbike Metal U Bolt Mount Kit & Quick Grip Holder for iPhone 13 Cradle Clamping Dimensions: Height Range: 5. 75 inch 8. 25 inch (approx 14cm 20. 9cm) Width Range: 2. 625 inch 3. 625 inch (approx 6. 6cm 9. 2cm) Max Depth: 0. 72 inch (approx 1. 8cm) 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)