Very helpful when purchasing, however, when the hob arrived it was not the one shown in the picture on the web site. I was told that the picture was only for illustration! the part number was for an older model. Sorry but i do not have all part numbers in my head. if I see a picture of what I want i order it without researching if it has the correct part number. The hob was returned, however, my payment of £1,810.00 has not, after several calls to Long Eaton and promises of calls back. The hob was returned at the end of Feb 2018, its now mid April and I am still fighting to get my money back. I would not recommend this company!!