Include two feed ports plus a perching base to accommodate small clinging species and large perching species that won"t feed on standard tube feeders, twist-lock feature to secure roof and allow for easy filling, and a one-piece tube and drainage holes to keep seed dry, For use with mixed seed and black oil sunflower seed, Dimensions: 6, 50"" x 7, 00"" x 7, 00"", SKU: GC12022