Features: brand new and high quality Allows you to aim or steer more precisely to improve game experience. Easy to install and remove without tearing it apart. Increases the resistance of analog stick for much smoother movements. Premium sponge material ensures maximum strength and durability for long lasting usage. Suitable for / PRO Controller. Specifications: Material:Sponge Type:Easy/Soft Applicable Model: Suitable for / PRO Dia:Approx.1.9cm/0.75 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2x Assistant Rings