This flexible connection (patented by Sovirel) consists of 2 semi-spherical mating pieces which are held together by means of tongs or flanges. Between the connections is an elastic and inert silicone rubber seal with PTFE coating, or a Viton seal.
To hold the mating pieces together you can use either articulated tongs with spring and a locking pin, or a separable pair of flanges.
Made completely of rust-proof steel 18 × 8. Packed one to a plastic bag.