Penn Plax BA223 Trimmer+Plus Cement Swings Wire Frames, 9-Inch MADE OF ROUGH MATERIALS: made of cement and seashells, this swing perch naturally trims nails and beaks for healthy, happy birds. INCLUDES METAL CLIP: the swing securely attaches to all types of wired cages. DIMENSIONS: this bird swing by Penn Plax is 9L x 14H SHOP PENN PLAX FOR ALL YOUR NEEDS: Penn Plax carries many types of bird cages, toys, perches, swigs, and more; as well as items for other pets  fish, dog, cats, reptiles, small animals, and more.