Bottles availible in sizes from 4.5 KG to 13 KG. Please check the size of your regulator, this is either 20 or 21mm the bottles are colour coded on the cap Orange/Yellow is 21mm and the Blue/Black are 20mm. If you are not sure, then please bring the regulator with you, when you collect the bottle. Please note, if you do not have an empty Flo gas bottle the there will be a rental charge for the 4.5KG and 7KG bottles