Thanks for clearing that up. there advertised on ebay @ £13 non erp and @ £22ish erp seems crazy dyson did a few mm,s difference. just a tip, I took the ends off 2 worn bbars usual carbon brushes worn and removed the carbon brushes off 1 and replaced with the nylon brushes off the other superglued in so have 1 good bbar with only the 4 blue nylon brushes on, works a treat.