This is a diameter conversion adapter for air filters. It converts a 76mm diameter universal filter to a 60mm diameter. For example, how about using it for a 60mm diameter, such as on a Swift Sport that uses an HKS Power Flow filter? *Photos 3-6 are for illustrative purposes only. *The filter itself is not included. *Photos 5-6 show an example of replacing an HKS mushroom filter with a universal filter. The direction of the support柱 (pillar/post) that came with the HKS filter has been changed. The clearance with the plug is very tight, so please do so at your own risk. ▪️Color: Black ▪️Shape: Ring-shaped ▪️Purpose: Air filter diameter conversion adapter ▪️Diameter size: 76mm → 60mm ▪️Material: Rubber Thank you for viewing. It converts a 76mm diameter universal filter to a 60mm diameter. Impressions after use ① It's a bit stiff when attaching it to a 60mm diameter. It's easier to install if you attach this product to the desired location first, and then attach the universal filter. ② The rubber smell is a bit strong. ③ Please tighten it periodically after installation.