[Interchange Part Numbers] SX075P30, SX075P30M10. Before making a selection, you can find a similar interchange part number on the original gas struts cylinder as a reference. [Strut Information] Gas Strut Extended Length (Ball Center to Ball Center) 7.80″, Support 30 Lb for 24 – 33 Lb Heavy Lid, Designed for 12 – 16″ Mounting Spaces With 10 mm Ball Studs.