Suitable for 26 mm shaft diameter. It is easy to install and convenient to use, you can install it in a few minutes. It would be a great replacement for your old or broken ones. Wear work gloves to protect your hands when installing this part. Specification: Material: Plastic Dimensions: 37x22cm(14.57x8.66in)(length x width)(approx) Hole diameter: 26mm(1.02in)(approx) Color: red Quantity: 1 set (inc. all nuts and bolts + 3 screws for blade, that is also inc.)