These Schumacher Racing Products shock diaphragms are a factory replacement for the ultra short shocks used on the Mi6 and Evo Mi7 platforms. The diaphragm sits inside the shock body to maintain consistent oil pressure and prevent air ingestion, keeping damping performance reliable over time. Sold as a pack of four. Features: Pack of 4 diaphragms Designed for ultra short shock bodies Compatible with Mi6 and Evo Mi7 shock assemblies Seals shock oil to maintain consistent damping 7/7/26 cs