Solid Oak Unfinished Height Adjustable Ramp Flooring Profile, Threshold Cover Strip, Door Bar, Suitable for 15-18mm Floors

what are the range of lengths available for weather bar hardwood floor trims, i want 1.5 metres

will this be suitable between different hard flooring 5mm and 15mm thick, if not what should I use as the plastic threshold keeps coming off.

Do you sell this in a 1.8m length?

Can anyone tell me the two different heights once fixed to floor