The DeFelsko PRBF90ES-D PosiTector 6000 Cabled 90° Extended Microprobe F90ES Only, Measures Coatings on Ferrous Metals, 0 - 45 mils is a right angle extended length (350 mm / 13.75") probe for measuring within areas of low headroom. With our smallest measuring tip, longest probe length and best thin-film accuracy, this instrument is ideal for measuring on small parts, hard-to-reach areas, or close to edges.