PALOZO 2.5 inch Split Flange Repair Kit, 2 Bolt 2.5"/63.5mm Exhaust Flange Flat Oval Split Flange Repair Replacement Kit, Pack of 2 Specifications Hole diameter: 2.5 inch Material: carbon Steel Use for: most car and motorcycle exhaust pipe modification and maintenance Package include 2 x 2.5 inch split exhaust flange 4 x hex socket head screws bolts kit Amazon Services If you have any questions or problems with the product, please contact us and we will try our best to help you as soon as possible.