Vent stop parts: 1719-01 housing, material is PA6 1719-02 spring, material is stainless steel Name:Vent stopParts:171901-housing.material:PA6 quantity:1 1719-02 spring. material:stainless steel quantity:1Package: 6000pcs/cartonFitting slot .313" x 1.563", fit 1.7mm to 2.1mm wall thickness. Available in various colors Window Accersory Vent Stop 1719