Position switch with one-way roller, Housing: Technopolymer housing, one threaded M20x1,5 conduit entry and external parts in stainless steel (FR series), Contact block: 1NO+2NC slow action (B20), Head: With one-way roller with external parts in stainless steel, Protection degree: IP67 according to EN 60529 and IP69K according to ISO 20653, Positive opening: Yes.