I ordered one from Gardiners and have used and will say what a great brush and i didnt notice any difference in weight on my clx 27,its amazing and 100 times better than them superlites,i had a first clean with the frames green and windows filthy it clened them in no time and the frames and sills were gleaming,with a superlite it would have taken ages.
great brush much tougher and no more scratches and marks on window sills,i can say its one of the best things i have bought for window cleaning,just wished i had bought one instead of buying superlites!