Diameter of the mounting bolts hole:1.2cm/0.5″ Bottom Width:2.9cm/1.1″ Fitment: Fits for 1 inch handlebars only. Brass 5.5″ Handlebar Riser Kit for Harley Cafe Racer Chopper Bobber For 1″ Bars. Condition:100% Brand New and High Quality. Hollow 5.5 inch handlebar riser kit for 1 inch bars. Hole Diameter:2.5cm/1. Total Height:13.8cm/5.43 Approx. Diameter of the mounting bolts hole:1.2cm/0.5. Bottom Width:2.9cm/1.1. Fits for 1 inch handlebars only. These are aftermarket risers and will not fit on some models. Make sure if the risers fits for your bike before purchasing according to the measurements above. Professional Installation is highly recommended. 1 pair Handlebar Riser with Bolts (Left and Right). Other countries need around 2-4 weeks. Thank you for your understanding. We will mark “Gifts” on custom form. All items are checked before dispatch and are carefully hand-packed by our in-house team. We always taking great care packaging every item to ensure safe and perfect condition to you. We will make every effort to prevent damage in transit. If you are not 100% satisfied with the item, please let us know the detailed problem. We will help you resolve the problem as soon as possible. We will give you a best solution. Return products must also be in its original condition: including box, packaging and all other accessories. You brought wrong size or wrong item. Please make sure the item have NO man-made sabotage. How to return 1. From Monday To Friday(Beijing Time 9:00-18:00). We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. Please give us the opportunity to resolve any problem. We understand the concerns and frustrations you might have, and will try our best to resolve the issues. We care about our valued customers, and will always try to help you. Communication is the best way to solve problem.