Exhaust Clamp Butt Joint Band Clamp Sleeve Coupler Stainless SteelFeature:1. No welding design makes exhaust clamp fast, easy and accurate installation. Arc curved face,capability prevent exhaust gas and noise leaks. Exhaust clamp is removable and reusable.2.The reaction block provides a full 360 equal distribution of stretching forces, prohipiting pipe distortion while complesing a seal round the joined exhaust components.3. Butt joint band clamp is a simple, effective way to connect most of exhaust tube and muffler components. Aslo can be used for muffler repair.4. 304 stainless steel band, zinc-plated M10 bolt and nut, steel gasket, aluminum alloy I-block.Easy to Install( No Welding Need)1. Make Sure No Missing Parts.( if there are any problems regarding our clamps, please leave us message)2. Put Nut Bar on One Side and Insert the Bolts, Then Put Another Nut Bar on(Notice:Put Arc Curved Face Toward to Exhaust Pipe.)3. Finally Screw the nuts to Connect Pipes.NOTE:Please check the size of the prouducts pictures, type and shape to make sure the item is the one that you need. If You Have Any Problems, Take Time To Contact With UsSize options do not refer to the exact size of the inner diameter of clamps.It refers to the outer diameter of the exhaust pipe that the size of clamp fits.For example, for a 63MM/2.5in clamp, can fit for the outer diameter of the exhaust pipe is 63mm/2.5inch