Special silent block kit for Vespa PX 125-150, GT, TS, Sprint, Super, GL, VNA, VNB, VBA, VBB engine made of ergal machined from solid and rubber of the highest quality and hardness calculated for maximum engine stability, especially when cornering and in the most extreme bends.It is sufficient, once the right and left pins have been inserted, to screw the two ends using 14mm Allen keys, inserting them in the appropriate slot at the head of the pin and tighten until it stops.In this way you are sure that the length of the pin is correct and above all defined.02 1mm shims and assembly instructions are supplied with the kit.