BSongbird Essentials SE7021 Hummer Helper Cage and Nesting ReviewbP PP Songbird Essentials SE7021 Hummer Helper Cage and Nesting PCage and nesting materialPAttractively packaged refills pre cut to fit the 7021 hangerPHelps take the place of spider webs and lichen in lining the tiny nestsPGoldfinches, titmouse, and other birds also use itPIncludes coated wire cage filled with nesting materialP