Penn Plax BA231 Trimmer+Plus Cement Perches Wood Frames, 12-Inch MADE OF ROUGH MATERIALS: made of cement and seashells, this perch naturally trims nails and beaks for healthy, happy birds. INCLUDES PLASTIC ENDCAPS: the perch securely attaches to all types of wired cages. DIMENSIONS: this bird perch by Penn Plax is 12L x .5D 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.