- 50mm Air Filter Interface Cup- Fits for 24/26/28/30mm Motorcycle Carburetor- Easy installation,direct fit- Stable characteristics, high reliability- Installation instructions not includedSpecification:- Material: Aluminum alloy- Inner size: 50mm/1.96 - Out size : 74mm/2.91 - Suit For: 24/26/28/30mm carburetor- Type: Air Filters & Systems- Part Name: Carburetor air filter interfacePackage Includes:1 Piece Carburetor Interface3 Pieces ScrewsNote:1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need.2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm)3. Instruction is not included.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you.