Feature: 1. Premium Material: Made of premium PP, the barbell adapter sleeve is sturdy and , reliable, wear resistant and has a long service life. 2. Change Diameter: The adapter sleeve can convert barbell rod diameter from 25mm to 50mm, i. e. 0.98in to 1.97in, you can use it to meet your needs. 3. Convenient: The black barbell adapter sleeve can convert barbell rod diameter, so that your barbell can fit more barbell plates with different sizes. 4. Jolt Resistant: The PP adapter sleeve is equipped with fastener, which can effectively prevent the barbell plates from jolt or loose, convenient and for you to use. 5. Wide Application: The barbell diameter adapter sleeve is suitable for gym, fitness center, home and other places, a wide range of application. Specification: Item Type: Barbell Adapter Sleeve Material: PP Color: Black Diameter: Approx. 5cm/1.97in Package List: 1 x Barbell Adapter Sleeve 1 x Hex Wrench Note: 1. Due to manual measurement, 1?3mm error is allowed, thank you! 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.