System 1 Short Inline Billet Fuel Filter, Black -6AN Ends, 4" Long,2" Diameter. 35 Micron Element - SY200-201406BSHORT BLACK INLINE BILLET FUEL 6AN Ends, 4" Long,2" Diameter. 35 Micron Element Part Number: SY200 201406B Excellent for carburetted applications, this compact 2" o. d. by 4 1 2" long (measured from tip of the flare fittings) inline filter is available with 35 and 75 micron elements and the nominal rated flow is 10 GPM. Designed to be installed between the fuel pump and carb, these red or black anodized filters can be obtained with AN 6, AN 8, AN 10,