The Link.
It works fine, got in first time no problem.
Years....I do mean years....1979 to be exact....ago I was an NGK Wholesaler and from your price the bloody things are still probably made for the same cost!
We used to sell them to the trade for about 95 pence each.....oh bugger did I say that. But then if you bought more than 50 the price fell to something like 75 pence.....tis only the profit that makes them expensive......Steptoes are the right price!