Having purchased a Gardman feeder and living in an area full of squirrels I decided to get the baffle to complement my feeder. O.K. at around £16 it may seem expensive, but believe me if you do have squirrels the cost can be more without one. Not only do squirrels eat through the bird food so quickly that you are constantly filling the feeders up which can be expensive in it's self but the birds don't get a look in, and that's the reason you bought the feeder in the first place. The other reason is that squirrels damage the feeders themselves, and yes i've hade squirrels in the past eventually bitting through wire feeder cages to get to nuts inside, which i've had then to replace. This baffle has been designed for the Gardman pole systems, and has three sizes avaliable to fit the Gardman size poles, as for fitting other makes of pole I cannot comment as I have no experiance of this, the size poles it fits are 12mm, 22mm and 25.5mm. The baffle is made from strong plastic with a diameter of 40cm, is easy to fit and is very easily cleaned, and most important of all it's very slippery which stops all types of small furry creatures from getting at the bird food.