I was astounded by the speed in which I received my Babyliss 458OU Replacement Energy Cells, since I am in Malta. Even with the exchange rate from euro to GBP the cells are well priced. I am very happy with service given. The energy cells are really cost effective as are a lot bigger than the smaller Braun Cells on the market. The cells are about 3.5 inches in length, from base to tip. I like these as they are a screw-in type gas cell and seem to be easier to insert than the braun. I have to buy mine from Amazon since there are no stockists that sell these in Malta. I think they are well worth buying. Since the hot brush that they fit,can be taken anywhere. To work or even on a night out. One full relacement cell seems to last quite a while.