I have an ageing 18' preadator pole and I have just bought 5 x extender 18' poles.
I have a gardiners superlight brush on both, the extender is superb, far more rigid then the predator and my mate who has a 21' X Tel pole cannot beleive how good the extender is in comparision to the Xtel.
You need a light brush on the extender to get the full benefit from it,but if you buy from cleaning spot get the black pole hose which is great as it maintais its supplness even when very cold.Buy 5 together andthey are as cheap as chips.
Neil