Cylinder head made of lightweight yet durable POM (polyacetal) thermoplastic.
The use of thermoplastic makes the head generates less vibration thus extending the life of the gearbox shell. POM material is also characterized by high abrasion resistance, stiffness and natural lubricity.
The head is sealed with an O-ring and has a rubber shock absorber at the bottom.
Universal construction for use in version 2 and 3 gearboxes.