Tensioner for single chain - Tensioner for single chain - Materials: Housing and column: polyamide reinforced with 30% glass fibre Screws and springs: stainless steel 304L Steel version: bracket and sprocket steel Stainless steel version: bracket, axle and nut stainless steel 304L, stainless steel sprocket, sprocket bearing lubricated for life (FM 222 grease suitable for food industry acc USA standards.