Petite Red Aviator Harness for birds weighing between 75-110 grams or 2.6 - 3.9 oz: Large parakeets, small indian ringnecks, cockatiels, small conures (green cheeks, brown throat), small doves, small quaker parrots * ESCAPE-PROOF! With other brands of harnesses, your bird can easily remove the leash and harness. The Aviator Harness keeps your pet safe and secure. * Self-adjusting leash: Automatically adjusts from the chest to the back as the bird climbs and flies. Fewer pressure contact points on bird. * The strong steel slides have been powder-coated black to make them unattractive as toys. However, we have not heard of any bird yet that was able to break it. * Easiest to install - one piece design - No buckles or clips.