- Construction height, diameter and connection thread are identical for all types, which guarantees exchangeability.
- As a result of the open construction, the source is connected to the foundation point only via the spring.
- The spring element can oscillate in the horizontal plane without restriction.
- The spring is clearly visible, which allows checking of its condition without dismantling.
- The distance between spring coils is visible under load.
- Accessories, base plate and height adjustment are universally applicable for all types.