This revolutionary ground guard allows you to be in control of the birds you want to feed the unique adjustable width mesh can be set to keep out most squirrels cats and large birds or can easily be positioned to exclude medium sized birds such as starlings or even young squirrels it can be secured to the ground by four removable stakes and protects all tube feeders up to approx 508cm 20 feeder and round sanctuary in product picture for illustrative purposes onlydimensions508cm