The classic Monza quick opening fuel filler caps were almost universally used on racing machines of the 1950s to 1970s. Suitable for the Bonneville, T100, Thruxton and Scrambler. It will also fit the Thunderbird and Adventurer. Easy to fit with all necessary parts included, the cap is aluminium with a satin polished finish. Once fixed the cap is functional by the authentic flip top release, and no need to unscrew like some other styles.