Replacement chain guard with for the Razor E300 (versions 36+ only). This chain guard includes the replacement bolts. Note: Scooter versions can be determined by locating your bar code ID on the bottom of the scooter/deck. The 7th and 8th digit in the series will tell you the version of your product: 01=version 1; 02=version 2; 09=version 9, and so on. Compatibility Razor E300, E300S, & E325