The spinner travels on threaded rods back and forth.
 
Your feather kids will love this one.
 
4"L x 2.75"W x 0.5"H
 
ENRICHMENT: Designed to promote play, the rod spins smoothly, traveling along the threaded rod, clockwise and counterclockwise from one side to the other. 
DURABLE: Constructed of solid, anodized aluminum and stainless steel, our toys are safe, chemical-free, durable, and lightweight. 
COMES WITH: All toys come with metal wing nuts and hex nuts for mounting to bird cage. Smart birds need durable and safe toys! 
DISHWASHER SAFE: Safely clean and sanitize your bird toy by putting it in the dishwasher (top shelf). 
MEDIUM TO LARGE BIRDS: Best for medium to large sized birds, the spinner is conveniently sized to keep even the most meticulous of birds busy. Great for cockatoos, parrots, macaws, greys, parakeets, and the like.