VW CV Boot. This style boot is used on the inner or transmission side of your drive axle on front wheel drive Volkswagens with 90mm CVs. This boot is also used as both the inner and the outer on 68-79 Beetles (Type I).
Instead of simply replacing the VW CV boot, you should consider replacing all the boots on both axles. Even if you don’t need to replace them all; the kit will get you tubes of grease and spares, to save you from adding more to your order later.