ILooking to buy a new Fuel Filter but when I find a maker whose price seems reasonable (eg. RIDEX) they offer three different filters which they say are all suitable for my Skoda.

But the internal diameters of the filters, as listed below are totally different. How can all of them be the correct filter for my engine? Isn't the internal diameter important?

Ref. No. 9F0007 Internal Dia. 11mm

Ref. No. 9F0033 Internal Dia. 19mm

Ref. No. 9F0029 Internal Dia. 38mm