ARANA 2Pcs 4578 Gas Charged Hood Lift Support for 1997-2006 Ford Expedition/ F-150/ F-250 Perfectly fits 1997-2006 Ford Expedition/ F-150/ F-250 Vehicle Location: Hood. Interchange number: 4578 Extended Length A [in]:13.30, Compressed Length B [in]:9.40, Stroke C [in]:3.90,Rod Diameter:0.31 Exact fit original equipment design ensures easy installation and precise operation 2pcs per package, we provide 30 days money back guarantee for any reason and 18 Months warranty(replace or refund) plus lifetime technical support. Extended Length A [in]: 13.30 Compressed Length B [in]: 9.40 Stroke C [in]:3.90