For cleaning heating element fins: Our radiator brushes are extremely flexible for reaching under window sills and in small spaces. The soft goat hair is so adaptable that the bristles also fit through the smallest slits in the cover. You dont even need to remove the cover first! The wire coating protects the heating elements from scratches.article number:510261EAN/GTIN:4037892102617VE:5material description:bristle area length: 30 cmdiameter: 4.5 cmsize:100 cm