Features: Suitable for 1 inch thick grinding wheel: The 3 different sizes have the same length, can be applied for 1 inch thick grinding wheels, which will help you improve efficiency and replace parts. Specifications: Material: stainless steel Color: as the picture shows Package contains: 2 x ID 1/2 inch x OD 5/8 inch x H 1 inch adapters 2 x ID 5/8 inch x OD 3/4 inch x H 1 inch adapters 2 x ID 3/4 inch x OD 1 inch x H 1 inch adapters Notes: A certain tolerance gap is designed between the bushes to facilitate removal and independent use. Please allow slight size errors due to manual measurement.